I'll tell you some fucking shit right now dude, and im gonna come off like a dick, and insulting and hostile, but i'd say the same shit to my best friend if he was in his situation

First

YOU!! YOU FUCKED UP REALLLYYY BAD to date the type of girl that's gonna cheat on you right after having your kid, and you definetly picked the wrong fuckng bitch to do that with and you fucked up real bad. Cuz maybe it was your fault, maybe she was a great girl but you were a dick and it forced her to cheat, but either way even if she wasn't it's still your fault for trusting a dumb bitch and you shoulda known better.

And for a fucking girl to have your kid, and then cheat on you FOR A MONTH, i the biggest slap in the face you could ever be dealt, SHE WAS THINKING BOUT HIS DICK WHILE YOU FUCKED HER AND YOU'RE GONNA DO NOTHING, if she wanted another guy she should have fuckin told you she does and left you. Go slap her in the fucking face really hard, (just once) or shake the fucking shit out of her, or take all her clothes and burn them or rip them up and break everything you ever bought her orrr start flirting with another girl and then give her all the shit you bought your current girl DO SOMETHING and I fucking suggest you leave her and try and get full custody of the kid

This fucking prick KNOWS she is ENGAGED TO YOU AND HAS YOUR KID andd for someone to do that to another man is so fucking disrespectfull but you fucking disrespect yourself worse because you're gonna let him get away with it!?!?!?! That makes you the biggest fucking bitch i know

Stop being a fucking pussy and grab a baseball bat and get some friends and go fuck him up the point he needs to be in the hospital and then take a picture and show ur girl and say YOU SEE WHAT YOU MADE ME DO YOU FUCKING BITCH, DONT FUCK WITH ME

Man this shit pisses ME off and i dont even fucking know you or your gf, i'm ready to come down to wherever the fuck yoou are baseball bat this faggots face in and cuss out ur girl do something u fucking moron