What would you do if you found out your

(This might get long, I want to see if anyone would do the same) 
Husband was flirting with other girls/ women on a dating website?
I know I'm going to sound stupid but he's been doing this since about a year or so after we were dating. We've been together for 3 years and 1 year married so 4 years in total. I knew about it before and every time I confronted him he just says "idk why I do it " , " I only do it when i'm bored" "flirting is not cheating" " I only talk to girls from out of state so I won't see them" okay well to me flirting IS cheating. And I don't know how anyone could flirt with someone else other than your spouse just the thought of me doing it seems so wrong. Also, i've seen his messages and these slutty little girls send him nudes like honey you just met the guy have some fucking self respect and quit being a damn slut. & he's a dirty pig for even asking for them. He also talks about sex with them so to me, it is cheating! Not to sound cocky or anything but the girls he talks to are so ugly like come on, if you're going to cheat do it with someone better looking than me! Not some paisa looking bitch or a fat girl(no offense to anyone) Every Time I confront him he will stop doing it for about 6 months then do it again. We have 4 phones which we share 2 that only works for text and call(we use those to communicate with each other when he's not home) , and 2 that we use at home (just for internet) with wifi. He uses one of the ones that doesn't work at school because they have wifi. I recently got an email that said to confirm the email for a texting app and I thought to myself why the hell does he need a texting app if we have our 2 phones that work for texting ? When he came home I got the phone and when I went to browser he had "kik" typed in the search bar and when I refreshed it it showed texting apps. 
This morning I was looking for the phone and found it in the bathroom, I checked the history and it had "skout" on it which is a dating website. I also noticed he deleted the email that said to confirm the texting app. I have it screenshotted in the camera roll though. Idk if he's just plain stupid or if he just wants me to see this because hello, fucking delete your web history if you're doing something you're not supposed to you idiot! I called my mom and asked if she can come pick up my baby (I don't want her here when I confront him) i'm going to show him the screen shots and see what type of lame excuse he has for me now.
I have his clothes all packed up, imma tell him to get the fuck out of my house. If he wants to be flirting with other bitches then he can go be single and do it, I don't need him here he can go back to his mommas house I take care of my kid on my own with no help anyway. I'm not even shocked about this that's why I don't even cry about it anymore i'm just so furious I feel like cutting up all his clothes and breaking all his games and game system seriously i'm not the girl to play with! The only thing that hurts me is that were going to have a broken family, so I feel bad for my kids but this is his fault not mine. I do love him but i'm not going to say and deal with this shit all my life, why be with someone you can't trust ? What kind of dumb idiot does shit like this, we have a baby and i'm due with another in 3 months. Whatever it's His loss not mine. It's like if he knows that I know that's why last night he kept asking me if something was wrong and he was being extra nice to me and today he went out with some family it's like he's avoiding me.... no honey, watch when you get home all hell is about to break loose