Well, i've done a little research on it (because I started late too) and I think that you are still in the range of "normal" (it says like 15-25 I think), so I wouldn't say that would concern me. The first time I cut myself, I was in my second year of college, so around 19 or 20 years old. I don't remember why I did it for the first time or what I used, and like you T and I are working on trying to figure out the triggering events - all I know is it was sharp and it left a scar. My T, however, has made no mention of trying to get me to stop - she's only asked if I want to (and was perfectly content when I said not really).

Then a lot of drama started from it and I didn't do it anymore until June of this year (i'm 25). Now I know how to hide it better, care for it, etc. and like you, I don't plan to stop anytime soon. In some ways, I think the fact that we are adults makes us less likely to stop (or to see the need to stop) because we are well able to judge the consequences of our actions and manage and control exposure to negative situations.

I will say though, that I can reflect to times in my past where I engaged in self harm behavior without realizing it (screaming until it hurt, hitting things, pulling hair, trying to suffocate myself in the pillow, and then in college drinking became a whole new level of subconscious self harm) purely out of frustration, anger, apathy, etc.

You're not alone!