You can do it!
I'm currently in transition, and like you I don't want to cut my hair. I have done that before and found that it is much easier, but without doing a BC I'm learning how to care for my hair in its most fragile state. I'm 5 months post relaxer, and just cut a little more than an inch off of my ends. My hair was past my shoulder and now falls in a bob that sits on my shoulders. The fun part is trying different products and styles in order to find ways of keeping your hair in a semi-natural state without having to straighten it. I try to only apply heat once a month. Keep it up, its all going to be worth it in the end!