<human>: I have been with my girlfriend for just about 6 years. She has seen me through so many ups and downs and has always been there for me. But inevitably all those changes left me as someone who I can barely recognize when I look in the mirror. I don't know if it's me or her, but I'm feeling like the love we once had is growing ever distant.

I am a full time student studying engineering and any time not spent studying I spend at work. Time, or the lack thereof, has definitely contributed to the strain in our relationship. 

I find myself dodgy at the thought of marrying this girl, having kids with this girl, building any kind of sustainable future together with her. I love her very much, don't get me wrong, but it just doesn't feel the same. She finds me annoying when she used to think I was funny, and many times she's downright rude to me and when I point it out she writes it off as me simply being overly sensitive. The sex is non existent and when it happens it's routine and she clearly isn't into it. 

To make matters worse, I live with her and her mom in her mom's house and if I leave I have nowhere to go because I can't afford to support myself. I feel terrible because I hate using people, but that's what this feels like even though I do still have feelings for her. I'm kind of lost at what to do. Either I'm going to feel like a selfish asshole and be homeless or continue down this path to ruin. There's just a pit in my stomach that's telling me this is wrong. I feel stuck. Any input is welcome.

Could you distill the essence of the text into 1-3 sentences?
<bot>: Our relationship just doesn't feel the same. If I leave I'm homeless and if I don't I'll continue to hate myself and resent her.