help!!! rocky 5 year relationship

Just wanted to vent really quick. So my boyfriend and I have been together for 5 years. We have had our ups and downs but got through them. But recently I feel like we have been drifting apart. He has made these new friends and they're good people but I'm just jealous and he knows that. So I think I'm making him miserable by me being jealous but I can't help it. And I think we have become more distant in the last few weeks- when I hold his hand it feels like nothing, when we kiss it's like we have to. I haven't seen him smile in a long time and I feel like I'm not enough for him. But maybe I'm just reading too much into it? I love him so much and I know he loves me but I just want to make our relationship strong again. But I don't know how to be better for him. I cant imagine not being with him, he's the love of my life. I want to spend the rest of my life with him. And I'm ready for it, and when I bring it up I think it scares him a little. How do I fix my relationship? How do I become a better girlfriend and kind of rekindle our flame? I just don't know what to do....