The cutting thing is terrible in and of itself but I have learned the hard way that is a warning signal of other things that are going on or may be coming. I don't mean to scare you, but these other forms of self harm manifest themselves as eating disorders, unhealthy sexual relationships, substance abuse and even suicide. I hope your counselor talks about these things with you and your H. I do suggest talking to your d and snooping. Maybe you and she can spend more alone time together--maybe a weekend away--something to make her open up. Depending upon her school, you may also want to discuss with them as these behaviors may take place there.
Re getting tired of being strong? I hear you 100%. Here's where you really need a friend or faith, someone with whom you can be weak and let it all out. You need that. Cry and let someone else be strong for you.
Gordie 40s W 40s M20+ kids 2016 BD W fantasy affair w OM1 I do everything wrong 2017 I start to DB W says TLTL files for D PA w OM2 2018 I do LRT W drops filing and OM2 situation slowly improving