Baby Daddy

so lately (like all week) i have been thinking of my baby daddy a lot. we get along well but i don't think i could be with him again. but i still feel love for him. i try to ignore my thoughts about him but i cant. im engaged. i shouldn't be having these feelings. i feel so guilty. i love my fiance very much. idk what to do. i don't have any friends to talk to about it so i am venting on here.