Hi, I'm new to this site. I've been out of the dating relm for awhile since I've recently got out of a long term relationship. I'm in my mid twenties and I've started dating this new guy. We've only been out 4 times, but each time has gone great with the last date being an overnight date, that I though went great, and I'm pretty sure he did too both romantically and just bonding etc. I know you can never expect too much up front from a guy, but I was a little dissapointed when he left for out of town yesterday and never called (between fri morn and when he left) to ask how my weekend went or to say "hey can't wait to get together when I return"... do you think this means he lost interest? Or should I just give him the benefit of the doubt and realize he was probably busy and excited for his trip and I'll hear from him when he gets back? I mean, we both had busy weekends. It's totally driving me nuts! Not to mention I sent a text telling him to have a good time, and posed the idea of casually getting together Sunday night, and didn't hear back.

I know that repremanding for past actions doesn't really help much, but I wouldn't have suggested having a sleepover so early in the relationship.
Anyway... all you can really do is wait. To call him too much might make him feel awkward, especially if he really is just busy.
I would say pick up some bubble bath and body scrubbing lotion, treat yourself to a nice night of relaxation, reading, and getting yourself squeaky clean. Read a good book, and fall asleep in some nice crisp sheets.
That way when he calls you again, and asks what's been going on (And trust me, he will call again, at least once, but I doubt he is avoiding you) you can say you've been reading etc.
This will impress him to know you are so calm and secure...

Anyway... that's just what I would do

:)