You can be glad to have a friend like Nina. She did it as an act of love for you - probably knowing you well enough, that you could not do it by yourself - which would have been the right thing to do in first place.

What Jayden did was expected. Regarding yourseld, starting a therapy and really understanding what is going on, is great. Those things take time and don't get resolved over night. You can be proud of yourself for acknowledging your mistakes and even more so, you are not running away from them anymore, you are tackling them.