Girl puts out ONCE in 3 years for bf who worships the ground she walks on, Reddit decides the answer isn't growing a spine but “therapy”

I don't know what to do

So a couple of months ago, my and my GF (we are both in mid 20s) decided to move together. We found something nice that is within our budget. It's nice, but I don't feel appreciated at all for the things that I do. It's the 3-room apartment. Bedroom, living room, and her office. Almost every day, when I get out of the office, I'll stop on the way home for groceries. We split rent 50/50, but I pay for gas and electricity. I'm also cooking, cleaning and if anything breaks down, of course I need to repair it. We've been together for 3 years and have had s*x one time. Of course, she's satisfied because I can make her feel good by other means, but I'm deprived of meeting my needs. I was her first boyfriend, so, she was nervous about being intimate. I was understanding of that, taught her how to kiss, how to feel ok with touch, etc. If she's not comfortable with something, we're not doing it. I'm supporting her all the time, but when something happens to me, she doesn't know what to do. Just simple question if I need anything or if it's something serious to go to the therapy. We have talked about it a couple of times, but nothing came of it. She says that she's bad with people and don't know how to help me. What should I do? I don't have any friends, it's just work - home - work - home, don't have my own place to relax or cool off, almost completely stopped playing games because she needs a lot of attention. Right now, day after day, my mental wellbeing is deteriorating. I don't feel appreciated, cared for or understood. I'm scared of hurting her by something that I will say or do. What would you guys do to make my situation better.

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Edit:

Thanks guys for the replies. As for why she's at home all the time it's because she's a remote worker, that's also why one of our room is her office.

We have talked about everything and decided that she needs to see a therapist. I've been told the main problem for her is showing her feelings and breaking physical blockage in intimate matters. She doesn't know why/ how it happened and what's the cause of all of this. So right now we're trying to figure it out and if it doesn't work out I'm going to put my wellbeing first.