Current boyfriend and ex male friend

So long story short I've been with my boyfriend for roughly 6-8 months now and instantly got that feeling that he is the one. Everything was perfect until I got this call that my "ex," (we never made it official because he wasn't ready) was in the hospital in very bad condition. He was thee best of the best friends I've ever had. I'm a type one diabetic and he's saved my life a few handful amount of times. Anyways I started talking to other people and dated a guy before the one I'm with now and lost all feeling for the "ex." Now I'm with my current boyfriend anyways after seeing him in the hospital just made me miss him. Obviously I cut him off fully because who I'm with now wasn't comfortable with us remaining friends. But I miss him. A lot. I love my boyfriend but it kills me to have to cut everything off from this friend. Seeing him really made me miss even getting advice from him. The little things. Idk what to do or how I should feel.