Don't take this the wrong way, but I think a way better question to be asking yourself is "Is this relationship worth it at this point in time?"
Seriously, once a guy is in jail, it's not really a question of "Is he really that into me?" and more along the lines of "Is this person really worth sticking by?"
I don't know the full situation, but, honestly, our society loads the deck against people who've been inside a jail for more than a day or two. And it sounds like your relationship is, not unreasonably, under some strain. Think hard about whether it's worth it; put yourself first, because honestly it doesn't sound like he is.
Also, personally, I recommend against masturbating in a booth for somebody. It's not nearly as fun as it looks.
Are you serious? There is a time & place for everything, woman! Stop it now!
Since Dan went there, I will too. A person doesn’t go to jail for singing off key in the church choir. It’s by making poor choices & that’s usually followed by blaming others for his lot in like. You need to find a man who is about truth, honor & good morals for starters. End of story….
OP- Why are questioning the integrity of an inmate? The bars and glass separating you two should have clarified that for you. That is the real deal.
Back up a notch or two and question whether or not it is in poor taste for YOU to have an incarcerated boyfriend whom you masturbate for while on a non-conjugal visit.
Okay, I realize that being in jail is probably not a great character reference for us to have on this guy, but I find the assumption that she should just break up with him unsettling.
People end up in jail for all kinds of reasons. Sometimes they're genuine one-time screw-ups that shouldn't automatically end a serious, long-term relationship. We don't know the circumstances here, so it's not really fair to assume she should just dump him.
With that said, OP, the fact that you asked if he's 'just not that into you' suggests to me that this was a fairly new or an uncertain relationship. In which case I would definitely think hard about maintaining this difficult relationship with a guy you're not even sure likes you.
As for the masturbation thing: a) there is a time and a place. Aren't those booths fairly public? Aren't they monitored? And b) he's gonna brag on his girlfriend--in that place, he's lucky to have one, and he's got bragging rights. In a male environment like that, the bragging is going to involve sexual favors. I'm not sure I'd automatically call it a dumpable offence.
But the question you need to ask yourself is: is he a (pick one) jerk, sleazebag, loser, etc.? Is he worth your time? We can't answer that question for you, because we don't know him. That one you have to figure for yourself.