I would say that the term "cheating" may apply in certain situations. What did "leaving" for him persist of? Were you living together, or were you dating and his family lives in another state and he had to go be with them? If it is the former, "leaving" generally means breaking up, and therefore it would not be cheating. If you were living together and he "left" for a short or undetermined amount of time, I would say that he is cheating. However, the next sentence in your questions indicates to me that he really LEFT, meaning that he broke up with you. If he is not responding to phone calls, e-mails or IMs, chances are he broke up with you. This, then, obviously, would not be cheating. As far as he knows, you broke up and he's a free man, or boy, or somewhere in between. Granted, this was a really crappy way to break up with you, if you're not sure whether or not you're still together (and it truly sounds to me like you're not sure whether or not you're still together). If he is close by, I would pay an unexpected visit to him and see what his reaction is to you. If his reaction is unfavorable (i.e., he looks dismayed that you still exist in his world), I would say you are broken up and let bygones be bygones. After all, he is not the only fish in the ocean, even if he is a whale. If his reaction is favorable (i.e., he glows at the mere sight of your beautiful face), then I would say you are still together, but he maybe hasn't had time to check his IMs, e-mails and phone messages. You did say his family was in crisis (or crises). Remember, no answer is the end-all be-all answer that you may be looking for. Follow your gut. If your gut tells you he is looking for another girl (or guy, it's always a possibility), then he probably is. It's like the test mantra I've been going by my whole life: Go with your first reaction; it's probably right. I don't know how many times I've changed the right answer on a test to the wrong one. I hope this helps.

Not necessarily. When is the last time he updated his profile?

if he is spending hours on yahoo and isn't keeping in touch with you...kick him to the curb...at the very least he is being inconsiderate and the worst is that he has ended the relationship without telling you...either way, you don't need this...

"Hijack" him while he is on Yahoo! and you 'see' him there. He might not be cheating as yet but the "single and looking" is definately signalling something....

No he isn't cheating...he has dumped you honey.

Thats mean! He might be but the "Single and looking" says he wouls cheating! I would do the same! Go on your yahoo say your having fun with guy or say your looking even if your not. Just to at least see if he says anything.

I don't know if he's cheating, but it sounds like he broke up with you, without informing you.