What should I do at this moment.?

I'm in a serious relationship and I'm also engaged to my fiance and I love him very much. More than life it's self. But I'm also in love with my ex who makes sure I'm okay everyday. Tells me he misses me and still loves me but respects that I'm engaged. I miss the memories we had. But then again I have memories with my fiance. And he always puts a smile on my face. My ex and I broke up so that we can focus on school and such and we will get bak together when I felt is the right time but then I met my fiance. Who never forgets my anniversary and such . But then I have my ex who tries to contact me everyday. Now the worst part is that they are enemies and can't stand eachother but I love them both... Wat should I do???