Sex and feelings

So recently I had sex with this guy who is 21.... I am 16 and me and the guy are both in relationships. My boyfriend is in college (18..) and please no negative comments I know it was wrong of me but I was REALLY craving affection and I know that since I’m young, and the guy is attractive I guess he feels like he has that “advantage” over me and could get me to do things easily... I’m catching feelings for this guy and I just get upset because ever since we had sex it’s like I really REALLY like him and I don’t like how he still interacts with his gf when my bf doesn’t even text to check up on me. My bf is slowly breaking my heart but the other guy isn’t making me feel any better anymore.. he’s only the second guy I’ve been with I guess that’s why I’m already getting attached.. some ppl might think I’m a hoe but I just made a REALLY STUPID decision. I just wanted to get that out my mind bc I’m just hurting myself... and also the guys girlfriend seems like a really classy, beautiful girl and she’s grown as well (20) and I feel sooo bad bc I just know she loves that boy so much and he does things behind her back but I just cannot leave this guy alone now.. I’m just a mess ..