What am I supposed to do when I miss my friend?

Okay, so I dated this boy for a few months (2 years ago) we broke up -but we were both still in love for about another year after we broke up,I had the opprotunity to get back together with him, or to move on to someone totally new.. I choose to keep boyfriend #1 as a friend, and kinda used boyfriend#2 to get over boyfriend#1… Anyways, me and boyfriend#2 ended up falling in love, and have been dating for a year and 3 months. I used to always talk to boyfriend#1 -even when me and boyfriend#2 were dating, and kinda flirted which ovb made my boyfriend mad… He felt uncomfortable with me talking to boyfriend#1 and broke up with me… This was about this time last year… So I stopped talking to boyfriend#1, hoping to win boyfriend#2 over again.. And it worked. I havent talked to boyfriend#1 for alittle over a year, I would never think about going back to him, but I think about him almost every day. He was my first love. And I really just miss him as a friend.. Would I be a terrible person if I talked to him again (without my boyfriend knowing?)

I serisouly debate this every day.. I really dont wanna hurt my boyfriend. We dont really keep anything from eachother, but what if he never found out?