Cheating With my Friend?

I've had a friend for a while and we sext. Don't question me right now, but that about it. We're friends and sext just for the fun of it and we've been like this for 3 years.

We go for ages without taking tho, a month or so cause he lives an hour away by train and I talk to him for a bit after sexting and both of us sending pictures and he started telling me about his girlfriend!

I wasn't jealous, but I felt bad for her. I know I'd be pissed if my man was doing this with someone else, but I didn't want to call him out and ruin my friendship.

So today he told me he was upset because his gf is depressed and that's making him upset and then a few minutes later he was trying to sext again! I didn't send anything or do anything that time, I just talked and made jokes cause I really feel for the girl!!!

Am I a hard person!? I didn't know!

I don't want to ruin our friendship, but I don't want to be used to cheat!

Its not irl so Is it this cheating!?