Most Helpful Guy
It sounds like he might just want a friendly friends with benifits with you. Or that you are very close with each other (friends) and he loves you in that way but can't see being with you the rest of his life. Either way it sounds like he really cares for you
Most Helpful Girl
If he doesn't want to be with you then move on. You can't force him to commit and by continuing to be around him you will just make it harder for you to move on and be available for someone who does want to be with you.