Lying boyfriend

So on Thursday my boyfriend was locked up for his child support. I get a call that he’s gone to the work release side and he needs me to pick up his keys. As the awesome loving gf that I am I get his keys and go back to get him clothes. He tells me the password to his phone to call a few people for him. What I didn’t expect was to find at the least 7 girls he was talking to. So I send his stuff with his cousin to drop off and then he calls me. He knows I’m pissed but I don’t say anything. He gets off to take a shower and I dig a little more. Sadly in his phone I look like his side chick. He has not one pic of me in his phone but pics of another girl. I texted all the girls letting them know what’s up. Thankfully they were all gracious enough to block him and apologize. I tell him what I’ve found and he’s all like I was just entertaining them when I couldn’t talk to you. (I go to bed early af) he’s like I only want you. I want to marry you and move in and blah blah blah. Now he keeps saying are you ok with getting married at the courthouse for now and where do you want to live? 🤷🏽‍♀️🤦🏽‍♀️ bruh why is this my life. I was dumb to think he wouldn’t do me like this. I love him but I didn’t even cry and it makes no sense to me because shit like this gets me good emotionally. I just needed to vent. He makes me wonder what’s wrong with me. I was doing everything a wife does and then some and we’re not married. Maybe that’s my problem. I give too much too early. But why is that a downfall? Why is being a caring loving person a punishment?