I have a friend, whom I'm not especially close to. After his breakup from his long-time girlfriend (> 5 yrs) he started sending me a lot of texts with mostly very mundane contents. I usually text little back (what is there to text, when someone sends pictures of new drinking glasses that look very... well, just normal?). I understand he's probably lonely after the breakup and seeks alternative attention, but I'm not interested in providing such outside what's usually common between superficial friends.
Since I've already been accused of being very unsympathetic (which I don't deny), but also slowly get annoyed of the constant random texts, I wonder:
Is there something like an average "expiration date" up to which one has to be nice and understanding to a "not-best-friend" (of opposite gender, if it makes any difference)? If yes, how long would this be? I haven't had any relationships that long nor have I experienced any extremely hard break-ups.
Note: I have the impression, I'm the best (?) female friend among many, many male friends, albeit not being very close. I have considered that sometimes men find it easier to talk to women about emotional topics than to other men, but he doesn't seem to talk about the break-up (I have offered to listen, but haven't pushed after he didn't). I'm actually not really interested, just thought one usually should offer.