It's not for me either. I used to be better at taking it than I am now, but I'm starting to realise that it never really worked, even when I thought it did. For a long while I was convinced that it's the best thing ever, and if I can't handle it then I just need to get stronger and better, and it's the way to real growth, and all that ********. I still am fine with it in an educational/mentorship situation, to a reasonable degree. But not in personal matters. What's the point of 'love' if it's just yet another thing to cope with?

I think, especially if you're considering ending the relationship anyway, you might as well try to tell all this to your T. If she can and is willing to accommodate your needs better, that's great. If she can't or is dismissive, then you know where you stand with her. Between those two extremes, things can get messy, but even so I think having tried is still more likely to help you move to a better place than just unilaterally deciding to quit. Also, these fears you have might be a good thing to explore with her.