WARNING: long story ahead ‼️

I had a long distance relationship with this guy until recently. We had been dating since January and it was great we used to be friends since like elementary school and I’ve liked him since then. Almost 10 years later we finally started dating. Everything was great! He was sweet he visited me at times. He was amazing. Then I told him that I got an interview for an internship up in his city for the summer and we were both excited. I went to the interview and I got the internship and I was going to start in June. I moved up there in May for my apartment and the first 3 weeks there were great. We would order take out and eat in my apartment or his sometimes. Then one day we decided to actually eat out instead of at the apartment, and that’s when I noticed that there was one thing about him I didn’t like. He’s a people person...and that’s not a bad quality it’s a great one. Except when we were at the fast food restaurant I was trying to tell him about the coupon he had asked me to look up and he was ignoring me and talking to the girl who worked there. He was asking her about her day and how it was going in the job. I felt so unimportant to him. He even complimented her and said that someone as pretty as her shouldn’t have to work with so many annoying customers. I felt so shitty being there. Then I talked to him about it once we were alone again and he turned everything around and made it seem like it was my fault and I hadn’t noticed until then that he did that a lot. He always turned every situation into my fault. But I still didn’t end it...we were so perfect for each other that I thought maybe it’s a phase or something. I started my internship and my supervisor introduced me to one of the trainers. This guy was going to be in charge of me. I had seen him when I first entered the building and he smiled at me. My supervisor made a joke “he’s in charge of the group with your shift so don’t get on his bad side” and the trainer said, “I’m Samuel...you can call me Sam and yes we will be together a lot of the time.” The three of us talked for another 15 minutes and I could feel Sam looking at me. Even when our supervisor was talking he wouldn’t stop looking at me.. ive never looked at another guy while having a boyfriend and maybe it was because we were fighting so much that I might have flirted with him a little, but just talking to him made me smile. I realized that if I truly loved my boyfriend I wouldn’t be able to do that so I broke it off. That’s when he said he would change and he’s be better, but that wasn’t enough ...he could’ve changed before and he chose not to. I see Sam everyday and now that I no longer need training I don’t really have to go to his office and talk with him, but I want to. But I was never the girl who just goes up to a guy. The internship ends in a few weeks and I don’t want to lose touch but I also don’t want to go into something new. I don’t know what to do