Honestly, if a guy is making future plans with you SO soon and only after a few dates, that's a big red flag. And he's saying he's very fond of you after only a few dates? Another red flag. Seems to me like he rushed in.

It was probably nothing YOU specifically did, but all about him and his own readiness -- he could be looking for immediate sex, or something more casual, despite him saying he was willing to wait. He may have realized he was rushing in, then may have decided to shop around. It could have nothing to do with you, so do consider that possibility.

After only a few weeks, you couldn't be that attached to him, right? After only a few dates? Plus, you weren't 100% interested to begin with. You move on by meeting and dating other people.

Unfortunately, online you get all types of men. Some are not honest and some are just looking for casual hookups. I suspect he lied about his nan being in the hospital.

Keep your head up though. There are good guys out there, even online. My sister met her boyfriend of four years on Match.com. He is a great guy.