My ex is my whole life?

I still have feelings for my ex, I can't stop thinking about him, I feel horrible for breaking up with him, and over something stupid as little as him not being a good kisser. But I find myself wanting too kiss him more and more now. My ex and I are great friends now, but it kills him inside too know that he doesnt have me, and it kills me that I'm not with him. But I'm with this other guy at the current moment, that I cannot stand too be with but like too be around. Been with for 2 years. Was with my ex only 6 months. For 2 whole years, my ex has not even tried too be with anyone else. Mainly because I think after we broke up. He says I'm perfect for him, and He is sooo perfect for me, I love him so much. When I was with him and I still do this, I'd find myself dollying myself up and being very lady like, and I would do anything for my ex. And with my current it's like I don't give a crap what I look like when he's around, Idc what I do. And I'd do things for him but too a point. My ex and I never had a fight, and my bf and I fight constantly which stresses me out, my hair is falling out because I'm soo stressed. My ex is soo sweet, caring for me, he would do anythign for me, he tells me all the time "Your bf does anything too hurt you I'm kicking his ***." And lol he's protective. I want my ex back so badly, my gut is telling me too be with him, I really dont think I will be truly happy until i am with my ex again. The only thing holding me back is my bf now, I mean I love him but I think it's in a friendship love way. I guess what I'm trying to say is How can I get my ex back and still keep my bf as a friend? I mean I did once before but I dont remember how I did that lol.