Looking for advice.

Since finding mrp i feel like I've been smacked in the face and woken up from this fucked up situation I'm in. I have learnt alot but i could do with red pill advice.

Me and LTR been together 1yr 8months. I moved in to her house she owned at 6months (i know BAD) and even worse at 7months she couldnt pay the mortgage alone as her ex and her were divorcing and separating assets so i came onto her mortgage (even WORSE). I pay half of everything but as i didnt pay deposit or anything she split the title 95/5 to her which at the time was fine as i just wanted to be mr nice guy. Since moving in the sex declined rapidly and this resulted in me discussing the lack of sex on a regular basis. Needless to say we are in a total DB now and have come close to splitting on multiple occasions.

I've never acted like this before, and i can diagnose a severe case of oneitis now after reading some sidebar and posts and NMMNG.

Problem is we have been planning to buy a bigger house together and have been house hunting for a few months. And worse problem is as i work in construction i have been doing house repairs here and have major work supposed to start this weekend. I now am concerned at spending more time/energy /effort /hours of my weekend renovating this house that i technically don't own and right now the chance of me leaving is high as i don't see her changing since I've been such a beta bux.

Do i stop all this now and leave or do i stay the course follow my MAP sidebar and lift and hope she follows and becomes attracted to me.