So i've been with this guy for 8 months now. He's 20, i'm 18. He's my first serious relationship, i'd had flings before but nothing serious or official before. He's deeply in love with me and proposed to me months ago, i said yes at first but made us go back to bf and gf after two months of being engaged becuase i felt i wasn't ready and didnt want to lead him on.
But the real issue is i'm not sure i love him, i really do adore him,being with him makes me happy in general and i was a mess before he came along. But i think about other guys (to be clear i would NEVER cheat, despite being tempted) and dont think this is a good sign. He'd be such ana amazing husband material in the distant future and an amazing dad if we ever had kids. am i too young to be se serious with someone? i adore him but dont think he's the one, should i persue the relationship and see if my feeling grow or end it now? Everyone ive spoken to thinks i should end it. comments welcome :) (sorry for the rant)
But the real issue is i'm not sure i love him, i really do adore him,being with him makes me happy in general and i was a mess before he came along. But i think about other guys (to be clear i would NEVER cheat, despite being tempted) and dont think this is a good sign. He'd be such ana amazing husband material in the distant future and an amazing dad if we ever had kids. am i too young to be se serious with someone? i adore him but dont think he's the one, should i persue the relationship and see if my feeling grow or end it now? Everyone ive spoken to thinks i should end it. comments welcome :) (sorry for the rant)

Sometimes love doesn't come quickly. I think you should tell him that although you really do like him, you're not in love with him. There's no need to break up with him yet because you could fall in love with him in the future if you really like him and he makes you happy, but you can avoid the possibility of leading him on and hurting him in the future by making sure he knows how you feel right now. He might no initially react well, but it's better than accidentally leading him on.
Even if he's a really good guy, if you aren't as ready for him as he is for you, you never did belong to him in the first place. I'm sure he'll find an amazing girl that's ready.