popping the Question!

So long story short, I met my boyfriend December 2015 we started dating and New Years decided to have sex. I was on BC but two weeks prior had taken antibiotics and well Feb 4th we found out I was pregnant. I barely knew this guy but I grew up in the Deep South and it's expected that you get engaged or married if this happens. I was very adamant about this because of several reasons. He tells me we will NOT get married because of a baby. So fast forward to April he buys a house and wants me to move in. We are still together and now living together. So I assume if he makes a big step like this (before we found out I was pregnant we had discussed living together at the end of summer we had got pretty serious) so I just thought he would change his mind and eventually ask me before September (due date) well I kept bringing the subject up every now and then. But when the baby was born he gave me a ring book and told me to pick a ring. I'm over the moon and a few weeks later I tell him I found one I like he blows up and says we don't have the money. So I throw the book away. And I don't bring anything else up. Well he keeps bringing up getting married and weddings and every time I would get my hopes up. So fast forward a few more weeks and it's now January 2017. He brings it up again because I'm about to be taken off my parents insurance. He says wanna go to the courthouse. I am totally offended by that!!! Like what in the hell !? I tell him no I'll figure insurance out myself. Well he brings it up a few more times since January and finally we get in a huge fight because I'm sick of hearing about it it's this point it doesn't even matter anymore to me. I told him I was happy the way things are and I don't want to get married. And it brings a huge fight on and long story short he ends up saying he wants to get marriend but he wants to ask the question and it be a surprise for me. He then wants me to find a ring I like so I show him the one I have always wanted and he said well we will get married next year then. And I said next year I won't have time to plan a wedding( our parents would have a fit because they want a wedding they've already said that) well I just lazily go about things I don't think about it much but one afternoon our baby wanted to be rocked while she napped so I was bored and got on Pinterest and started looking at wedding pins just trying to see some ideas not anything serious well I lay the iPad down and don't think anything of it well later he picks it up and freaks out telling me we aren't getting married tomorrow why am I planning it blah blah. And I was shocked he told me I could start coming up with ideas. So I am pissed at this point. He has teased me about this and I am so done with it. I tell him I refuse to marry him and I do not want to discuss the subject again. I have been suffering forever Post Pardum and honestly I'm sick of finally getting myself better and he keeps bringing up a sore subject and I spiral again! It's stupid and I assumed that was the end of the discussion since it's been a month and I haven't heard a peep about weddings. Well yesterday I woke up with swollen tonsils and I knew I was going to go to the Dr and they were going to inform me again I needed them removed. Well the insurance I have doesn't cover that it's minimum coverage and he again suggests going to the courthouse to get married for me to get good insurance. I look at him and say why would we do that!? You refused to marry me because of a baby knowing I was not covered for maternity therefore making me get Medicaid. Why in the hell would I now marry you for a surgery!? Isn't that the same thing as getting married because of a baby? And I said no again! I'm really pissed off because he knows I'm depressed and he knows when he says things like that it'll get my hopes up. I've asked him many times to stop bringing it up.... but yet again I hear him asking to get married but not tell anyone so I can have better insurance. I just don't understand it. I realized he wasn't ready that's why I stopped asking. I then realized I didn't need a ring or a piece of paper to prove I love him. I don't need that anymore. I am so happy with our family why would I change things up.!?? We can't afford to have a wedding right now and honestly I was all for a courthouse one but his dad told him absolutely not. So I'm fine with waiting a few years. But he keeps insisting on bringing it up. I have put off getting my tonsils taken out for 3 years he knew that so why can't I put it off longer until I get better insurance. What is the need to keep bringing up getting married when he is just going to shut the idea down a week later!? Does anyone else have this issue!? What is up with him!? I don't know what to do or say anymore. I need advice on what I need to do the next time he brings it up. :(