I'm going to my school's gym and with their new summer hours, they are closed Saturday & Sunday. I work out every single day, and 2 days without the weights, treadmill, elliptical might get me off track! HELP!!

How about a nice long walk on the weekend?

Go outside and walk. Look up some body weight exercises. Jump rope.

During the summer months do some x-training workouts like biking, hiking, jogging/running outdoors, kayaking, swimming . As for weights do some body weight exercises, as someone suggested, it's only for 2 days, the rest of the time you'll have the gym equipment... You'll do just fine and you may learn some things that you never thought of doing...

How about changing gym?
Or buying weights?

I take the weekends off from my cardio and weight training routine and just go for some walks. My body likes the break. When I am go back on mondays, I am energized and stronger.