I'm confused about my relationship with my boyfriend (sorry it's long)?

We're both 16 and have been dating for 9 months now. Every day I spend so much time googling things like "do i love my boyfriend?" and "is our relationship good?". He genuinely loves me, but I'm not sure if I love him. We've both said we loved each other and he frequently talks about how happy I make him and that he wants to marry me someday and that he loves me more than anything or anyone in the world. I say those things back because I've already said them before and it would hurt his feelings if I didn't feel the same way... I feel so twisted up inside. He's always there for me and he loves me a LOT. He needs me, and I don't know what to do or feel. I don't even know how to organize my thoughts... He's always paranoid that I'm gonna break up with him and he's like "please babe promise you'll never ever leave me <3". And I promise. Honestly I wish he didn't love me so much. Then everything would be OKAY. No one would be as hurt if this were a typical teenage thing. I'm still a kid! Also, he's still haunted because a girlfriend he had in the past and REALLY liked (he says he never loved her like he loves me) broke up with him, and he's still hurting from that. I just hate that I feel like I'm going to end up breaking his heart. He just doesn't seem RIGHT for me a lot of the time. Sometimes things seem fine, but to me we're drifting apart. We rarely see each other anyway. I need someone who is more talkative and insightful, and my bf never really thinks about anything deeply and has no hobbies and I don't even feel like I know him. I know that sounds horrible. He and I text all the time but I feel like we never SAY anything. We've had great times together and this is my first long and serious relationship, so it's extremely difficult to feel this way. His parents love me, my parents like him, but I always find myself thinking negative things about him. Sometimes if i talk to my mom, I'll say things like "He doesn't like poetry!! Can you believe that???", "He doesnt hold his fork and knife the right way", "We don't have anything to talk about." "We have nothing in common." Just random problems and observations and she tells me: "See? You're already being selective about the type of guy you want to be with. Just wait for college- you'll find the right guy and blah blah blah blah." She likes him and all, and we both realize I'm just a teenager and people change. At the same time, I don't know if I'd be making a mistake if I break up with him. If he REALLY loves me... will anyone else ever love me? I've gone all the way with him, and so now I feel like I HAVE to be with him too. I don't regret doing it, but what if nobody else will want to date me because of that? Somehow deep inside this relationship just doesn't feel right. And I don't know if I love him or if I should wait it out or if I should end it. I've been feeling this way for quite a while. One more thing- I cheated on him. I really didn't mean to, and details are not needed, but I told him about it and he cried and was so hurt... but he didn't break up with me. I know cheating makes me a bad person on its own, but how can I break up with him after he forgives me for that and buys me gifts and is so devoted to me?