I have no sex with my GF

We have 3 years of relationship up to the day I'm writting this and we have never had sex so far and probably we wont, at least for many years more. This is the situation, we are both adults in our mid 20s, we both have a degree and have been working pretty decent jobs during the recent years. Before my current GF, I never had any sexual issue with any of my Exs, but on the contrary l, my GF was/is a virgin and I'm really her first BF. I dont want to give mamy details but I know her enough to tell that this is true.

Yes, she is in her mid 20s and she has never had sex, of course we have tried many times but we just can't. It's not that we don't have chances or that there isn't a sexual attraction or something, the problem is that her pussy is really tight and I really cannot go inside without making her feel a lot of pain, and that pain makes her tight her pussy even more, making the act literally impossible. She doesnt have a hymen, she is the kind of woman who lost it "naturally" by other means than sex.

She has spent quite a lot of money on therapy hoping that an speciallist can help her (us) to get something done, but sadly, even after following the expert's advices and tools we still cant. Of course this frustrates us and recently I told her to stop spending money on that.

In my opinion sex is an important component in every romantic relationship, and we can't have it. This makes me both, sad and mad at the same time. Even though I love her, sometimes I feel like I'm losing my time, because I really enjoy (or at least enjoyed, in past tense, with my Exes) having sex and my GF can't give me that. I know she has made an effort, but I cant help to feel sad because of the amount of time and money she has spent on therapy just to be completely in vain.

Yes, I do have a GF and I love her. But we havent had a single fuck ever since we know each other. Yes I do have a GF but I still masturbate in secret.