It's not necessarily the person. It's if I have strong feelings for the person. There are guys who text me all of the time and I find them to be annoying. I don't get a "hit" unless he's the guy I'm interested in.
I'm working with my therapist to see how much time in my day is spent thinking about and texting that guy. I'm recording it on a daily diary card so that we can track it, and then come up with healthy ways to distract myself from it.
I've also continued with going to NA meetings since I'm coming off a prescription drug.