I definitely understand, I learned to do this pretty young; at a pretty deep level I thought I really had to. This stuff often feels to me like part of myself is making these decisions to cope without feeling everying, or to feel and deal with that, at a deeper level than I usually go around being aware of, yet it's always there too. This probably wouldn't make sense to a lot of people...
I'm not sure suppressing emotions always leads to being worse off; I think that can be a really complicated question. I think many people can do this for important survival reasons.
I got an education and lots of survival skills for living on my own by doing it. My goal was to get out of there, where my brother was; I believed it was for my own survival at the time. If there had been good help available at the time that I knew about, I might have chosen to take it, if I'd understood what was possible; I am also glad now that I have these skills, though.
It's very unclear how fast we actually can work through our stuff though! A lot of us need to deal with the world, at least to some extent, for many years of working on these issues... Also, you might not actually *want* to put aside everything else you might possibly like to do with your life, in order to heal. You might want to heal *and* do other things.
Yes, it's stressful to do this; you could use a perspective that you are also not just your ptsd though. I hope you are taking classes you like?
All I can say is, watch your stress levels, and try to listen to yourself and be good to yourself; keep working on your self-nurturing skills. Taking time to listen to yourself, to figure out what you really want, is difficult but very important to develop. You can try to listen to your "gut feelings"; sit still, or perhaps go walking or whatever helps you, to let some of your deeper feelings start to come up part of the time, then turn this down some and take classes and such. The ability to make this choice can be a gift to yourself.
I think I've been at stages of healing where I haven't been able to do this so well, but other times I have. However I'm very glad for my degrees! Being able to support myself feels safer to me, and my life has been much richer, than it would have had I not used some of these "survival skills".