If you're not 100% in on this relationship you should probably do him a favour and get out, rather than string him along while your dissatisfaction grows and then break his heart later.

Your fella sounds like a huge catch, but you're not sure if that's what you want from life. If you don't love him for who he is then he's not (at least right now).

It sounds like you second guess yourself a lot, so unfortunately whatever you decide you'll likely regret, just make sure you remember that whatever you choose you don't get to blame him.

There's no 'right' answers for most of life, there's just the choices you make and living with the consequences, so crack on, make your choice and commit to it.