cheating on him

UPDATE- we are not physically having sex at this point so I can't get pregnant or an std by him.. he lives 12 hours away with his wife and 5 year old. He's the one who approached me and started talking to me again and talking in the way that we are. He doesn't want to be married he's only married for his son him and his wife work different shifts and don't see each other often. He wants more kids and she doesn't. They only have sex like 2x a month.. 
Original- I'm cheating on my husband.. I am 22 and when I was 17 I met my husband and 2 years later we got married it feels like I litterally went from high schooler to wife over night.. this was my choice but I think I made a mistake.. my husband and I constantly fight and the only reason we have sex is to ttc.. I know if our relationship is like this we shouldn't be but I honestly just want a baby.. my husband and I had an mc earlier this year and have been completely disconnected since.. I'm having an emotional affair with a man who is 35 years old and is also married..He's my best friend and I talk to him about everything and I don't plan to stop talking to him in the near future.. I don't wanna divorce my husband because honestly I feel like it would be more of a pain than not.. but Idk what to do