What do I do?

I'm friends with this guy named Ben. I had a minor crush when I first saw him but was too shy to talk to him. We eventually started talking. I remember this one day I saw him a bit sad. I asked him what was wrong and he said that he was ugly, and that he needed to lose weight. I kept telling him no that he was beautiful and that he shouldn't feel that way, and that he shouldn't care about what other people said. He kept beating himself up so I told him that I used to have a crush on him in the beginning. He looked at me with amusement and said, "really?". I told him I did, and as cheesy as it sounds I said that he's perfect. that he shouldn't care about what other people say. So time goes by and we get closer. We talk about lots of things, and usually spend most of the period watching youtube videos and laughing. He would put his leg on top of mine and leave it there. And we would sit pretty close. Still do. We started calling each other bitxh and how, which I've never felt comfortable to do with anyone else but this time it felt right? I felt comfortable enough with him so I would play along. He also had this habit of getting below the table and staying there, which he found to be fun, haha. I would always help get him out and we would crack up like crazy. I remember this one time I told him, who's gonna pick you up, and he smiled and said, oh you know you are, and I just smiled. There was this other time when he asked me to pick him up and I think I saw him get a boner... yeahh, I remember this other time I was looking into his eyes for a long time to see if they were getting red (long story, and no he doesn't do drugs) and we were just there making eye contact but I creeped him out, haha. He said stop looking at my eyes(not rudely) but I was like damn, I was enjoying it haha.Rhi is so silly but I'm gonna add this anyways. Ok, so he puts this Madagascar song and I tell him he's the lion. Then I say I'm the bear. then we see the girl that's a hippo? Idk the one that dances with the giraffe. And we both say at the same time that that was me, haha. (He wasn't saying it rudely)Then he points to the giraffe that was dancing with her and he's like who's that. All I said was idk. But in my mind I was like you if you want👀

He used to call me ugly and I didnt know if he was joking around, until i told him something about it, and he said he didnt actually mean it, that he was just messing around. And he hasn't done it since. Which I really appreciate.

So recently I told him that I was going to get a schedule change and he got sad. He has brought it up for the past two days and has told me that he doesn't want me to leave and for me to stay. As much as I want to, I have to take the class because it help me get college credit. Although I'm really contemplating taking it. I know I shouldn't be contemplating and that education comes first, but he is going to leave when school finishes, and I will never see him again since he does not even live in America. Yesterday he brought it up and it looked like he wanted to cry but I'm not sure if he was just goofing around or not. And today he told me again, and I told him that it was extremely hard for me too, and that i really wanted to stay but it could not work out in my schedule. I told him to add me so he added me through messenger and i can just message him through there now, but it won't be the same. I told him we could video chat but he just smiled and turned away. I asked him "what?" But he didn't say anything, and kept smiling. I also told him that we could go out, and he agreed and we both said to "the movies" at the same time, haha. I hope we get to do that. Also, today we were sitting close (as usual) and he turned his face towards me when he was saying something and I turn to face him and our faces are less than an inch apart. I turn back and nod to whatever he was saying and turn to face him again, our faces so close together and our lips lined perfectly. I look away, embarrassed due to how close he had gotten, and remembered the dream I had the night before where we both kissed. We went back to watching youtube videos on the computer. I also like when our hands and knees touch. i dont know if that's weird, but i like to be with him. I like when his leg is lightly brushing mine and our arms are next to each others. They're there for so long that when he sometimes pulls away it will leave that spot feeling cold and just wish he could leave it there. So I'm falling for him. I love his laugh, his eyes, his smile, I love how he gets happy to see me. I remember this one time I was putting stuff into my backpack and he asked me if I was leaving, I told him no. Then he asked if I would ever leave him, and I said no. It felt nice to know that he cares. and now I feel bad that I am going to leave him to go into another class. I've tried everything that I could possibly think of, but I am still not able to keep that class. I have feelings for him, and I also care about him. I am really debating whether or not to stay in the classs.i am really going to miss him so much. I know we might be able to go out sometimes, but it won't be the same. and it's not a guarantee. I know he doesn't like me the same as I like him, but that's not what's important to me. I just want to be with him. I can be myself around him, and I feel very comfortable with him. I know this probably sounds nuts to a lot of people, but I can't help ut feel that way. I feel like I may be falling in love. What should I do. what do you guys think?

Please, no hateful comments.