Dealing With Time Apart

Granted I'm probably in no position to speak authoritatively on the subject, but it sounds a lot like you've fixated on this girl because first relationship and all. Makes total sense. Don't do it.

Also the fact that you're 23 and this is a first date implies you've got some social issues. You should be aware of that, and actively work to fix it because otherwise your isolated existence will lead you to extremes in situations like this. Find other things to fill your life with. Go out more in the evenings. If you find an activity interesting, don't listen to excuses why you can't pursue it. Your life can't revolve around her. That won't end well.

Jam it back in, in the dark.

Join a gym. Start a work-out routine. If you work full-time you've already used up something like 9 hours of your day. A visit to the gym can eat another 1.5 to 2. Try looking at groups on Do something, Learn something, Share something, Change something - Meetup.com in your geography. That can both broaden your social network and provide you something to do.

And no, if you habitually isolate yourself, then changing is not easy. Realize that is not an excuse.

There's nowhere I can't reach.