Should I be a bitch about this?

So I am engaged and there is a big thing that is pissing me off about the relationship. Not sure if its a red flag or what but anyway. Before we were in engaged, when he was just my boyfriend, we lived together in an apartment. The agreement was I'd pay half the rent. Unfortunately I got laid off and surprise surprise its really hard finding a new job during a recession especially when you are a college student. People give me the excuse that oh you will skip work to study and blah blah blah. So I gave up. Now, when we were in this apartment he made it very clear how serious the relationship was and how he wanted to marry me and how I don't need to worry about the rent. Well over a year later we have been going to couples counseling and things were going really really good but the past two sessions he keeps bringing up how I never paid my half of the rent. Now I have a ring on my finger and thought it wouldn't matter but he keeps bringing it up. I still haven't found a job. I have been rejected so many times now I lost count. So I am lucky that for this semester I qualified for a LOT of aid. I can get ton of loans. So I got this idea, since he seems so sore over the fucking rent I'll take out a loan and pay him with it. Yes, later I will have to pay that money back but I am just so sick of the bitching. I thought since we were so committed like he had been claiming for years that he would let it go. I already feel guilty enough about it. So would that be too bitchy? For me to take out the loan and pay him that rent? I did the math and its around $4000. On the other hand, I feel maybe I should confront him about this and say look, you told me to not worry about it and now you keep bringing it up. You either need to drop it or take this money and shut the fuck up. I feel like maybe I am being kind of a brat over this but it just drives me nuts when people will say "Oh don't worry it's cool" and then I turn around and find out they were lying to my face. If he had just been honest from the get go that he wanted me to pay him back I wouldn't care at all. It's this lying crap that pisses me off.