This does not sound good.

I'd say a couple of possibilities. Knowing men, he's trying to talk to as many women as possible. Maybe another one he was talking to showed some interest and they hooked up before you did with him. It's even possible he liked you a lot and got freaked out, as you two seemed to have a connection.

Whatever the case, wait and hope he goes back. If he doesn't, **** him -- figuratively. **** him. If he treats you like you're second choice all of a sudden, treat him like he's last.

Example: girl I'm talking to quite a bit abruptly stops writing. Then TEN DAYS PASS, and she writes me all sort of "interested" again and CLAIMS her "email wouldn't send her reply" to me (suuuure). She said yahoo email wouldn't send it. Mmmk.

I get the feeling she had another guy on the hook, didn't/wasn't going as she expected, now she's back to me. I really think that's the case. If someone wants to talk to you, THEY WILL. She'd have used a different email, if it wasn't working, to get the message through.

If a guy doesn't treat you like you're number one, move on. I know it's hard because that puts that insecure feeling inside of you, like "What's wrong with me?" Just move on (says the guy who can't move on from the girl currently not caring about him).