I don’t know what to do😩😩

I am 15yrs old and I am a sophomore in high school. I have been dating this guy for almost 3 months now and I feel like I really like him. We don’t talk or hang out as much as we would like, but we don’t have a lot in common and so we don’t have anything really to talk about. The thought of breaking it off has gone through my head a couple of times, but I really don’t want to break his heart. When I do think of me dating I see me and this other guy dating and being together more than I do me and my boyfriend now. He said that I make him happy and that he really likes me (the L word hasn’t been exchanged). But than there is this other guy that I’ve liked since freshman year, and we have a couple classes together this year. I’m really shy and he doesn’t care, but my boyfriend tries to make me talk even when I feel and look uncomfortable with talking at that moment. When me and my boyfriend now hangs out I feel uncomfortable, and that he’s only with me for how I look. He tries to convince me to do things when I told him no and he doesn’t stop trying until he gets what he wants. The other guy kind of accepts who I am and he doesn’t care that I sometimes just smile and nod. He doesn’t try to make me do something I don’t want to do or anything similar to that. He knows my boyfriend now and he always asks questions about us, like if we’ve kissed yet and what we are doing for our 3 month. I don’t want to sound unfair to my boyfriend now, but when he asked me out I really liked him but now that I know more about him and his personality, we just don’t share the same interests. I really don’t know what to do😩 so sorry for the long post