I teach, so I'm off in the summer. My summers are usually filled with going out (my sister is a bartender) school work (I was working on my masters) and vacations. This year I graduated, I can't go out and we just couldn't afford a vacation this year. I sit in the house all day with my dog. I feel so lonely. I'm just ranting.
Re: Lonely
For me transportation is an issue so I've learned to pick up hobbies. Last summer while pregnant with my son I crocheted a lot and justified it as I was saving a little money by making baby things myself rather than busing them premade, plus it was a little more special.
If there's a way you could get out to the pool, that might be something too.