i really don't know, my mind says leave? i don't know why.... he's perfect! Options

[grab-it]

Okay... so

I've been with my boyfriend for 5 years. We were both 15/16, and now we are 21.
It hasn't always been amazing.
I've been the one who cheated, stupidly. It all got the better of me and I confessed everything up to him a couple of years ago about what I had done and I told him to leave me. And he didn't. He stayed with me.

He has always stuck by me through everything, and me with him. There seems like nothing that we can't get through. We have been through so much together, we have grown into better people with each other.

He always talks about the future with me, and how he doesn't want to be with anyone else and I'm the one. And i think I feel the same, I don't know what I would do without him.
No matter what happens or what little things we fight about things always get better, and he always makes me smile.
He treats me like a queen, hes never cheated, never done anything wrong, has been my best friend, my rock and everything. He would do anything for me.

And now I am thinking I don't know if this is what I want?
I don't know if I want to stay.
And I don't know why?
I know people would say if he has done nothing wrong then .. you have no reason to even feel like that.. I mean yeah he gets jealous of me talking with other guys, and making friends with people but thats only because of what has happened in the past - and I do everything that I can to make him feel easy about it because there isn't anything going on with anyone else.
I love him to bits, and I can't imagine being without him.
But I have this strong .. feeling.. that I need to let go.

And I'm scared that if i do, he will disappear and be gone and I will regret it for the rest of my life because nobody will ever be like he is..

If anyone has any advice.. or thoughts ...

I just don't know ..