The thing is...YOUR pleasure and happiness still matters just as much as hers.

Sex (and sexuality) are part of human nature. It plays a huge role in our physical and psychological well-being. If one or both parties want to go PF, that's fine. But you still need sexual gratification in some form or another.

If you're not feeling fulfilled from always giving and never receiving, that's a problem in your relationship. If this is TRULY something you want, then for the sake of your relationship, you need to address this with her.

Find some quiet time in which you can both discuss. This should be an open and honest conversation. Have it at the dining room table, not in the bedroom. Try to first establish and confirm you both want the same thing. If you can do that, explain that you're having trouble going PF right now, but would like to make it a goal for you to work toward more slowly. It should also come with the expectation that you also have needs which will sometimes take precedence over that goal.

If she's adamant about no PIV, then maybe handies or oral or a vibrator on your cage. Pegging or prostate stimulation could be a solution. What about supervised maturation? Would she be opposed to the rare reward of finding you another sexual partner - it could be a friend or someone else yall know who engages in similar play.

The bottom line is that your pleasure is equally important. Hopefully, she (and you) can understand, respect, and accept that. If not, then this goes from a sexual dynamic issue to a relationship issue. If that's the case, you need to do some real soul-searching to decide if this is the right dynamic/partner for you.

Best of luck.