no bashing please~~~~

Ok so years ago I was talking to this guy (we hung out basically daily, talked all the time) i had strong feelings for him but wasn't too serious as we didnt do anything and he was scared of commitment. Anyways... He and (my fiancee) were best friends. Well my fiancee was the one who was the shoulder to cry on at that time. He was telling me all the cheating basically the other guy was doing on me.. okay well I ended things w/ that guy and me and my now fiancee started talking. (Weird I know..) anyways we GOT serious. We also got pregnant! Him and his friend drifted ways..not 100% bc of me. But bc his friend was childish and he was not. Stuff like that. You gotta grow up sometime!! Ok they stopped talking for a year... Recently started becoming friends again and hanging out a lot! Ok here it comes.... Everytime I see him I 'feel' something. 😧 There's no communication between us (besides saying hey, how are you and what not bc he's in our home) no texting, && NO sexual contact. So why do I feel it? Is it bc of my past feelings? I want it to go away. I'm too loyal and I would never!!! But the feeling.... It's like butterflies and smiley faces.😩 Please ladies advice. I do not want to be beat down! Trust me, I feel shitty enough.