Boyfriend troubles

I’ve been sad recently, I found out one of my friends tried to kill herself and a friend cut herself with staples she got from me. My boyfriend hasn’t really been there for me. At lunch he just plays games with his friends and I sit there awkwardly next to him or I stand by as he does something immature. I don’t feel anything when he hugs me. I just go to my classes and do my work then go home. Recently though, I found out that an old crush I really liked likes me back and I’ve been talking to him. I told him I liked him back and He kept me from cutting myself. I don’t really feel anything for my boyfriend anymore. He hasn’t made me happy, but this other boy has. My boyfriend still loves me though, as he’s told me and mutual friends. I feel like I used him because I was desperate. But now I feel like I have a genuine connection with the other boy. I think I should break up with him but I have to present a school project with him in about a week so yeah it’s going to have to wait. I’m just really confused as to what I should do. I feel trapped