You can do it!
Just stay with it and have patience. Never rip through your hair with a comb out of frustration. Always do your hair when you have plenty of time so as not to rip through tangles. Use combs with no seams. Ditch the harsh brushes. Don't use any harsh products. Always make sure that your hair items are "hair friendly."
Are you natural or relaxed? If you are relaxed one thing to think about may be to ease up on processing time, and to start "texlaxing." insted of relaxing bone straight. It will help you keep body in your hair. Also you may want to do no heat. That will help your strands stay more healthy too. You would not believe the differences you will see with simply treating your hair right, as opposed to using a lot of different supplements and products.
The major thing I really love about henna is that it wll help to thicken up the strands of hair, it does not leave my hair hard like protein does. You may want to give it a try. There are thousands of posts on it.
HTH
Softresses