I need advice.

Whats going on,

I need some advice on what to do with myself. I'm currently a 21 year male and I have just finished my junior year of college. I'm back home from the summer and I don't really understand what is happening to me. I can't tell if I'm depressed but whenever I come home for extended periods of time after being away at school things just seem to go downhill for me. I love school as I'm surrounded by my best friends and I am free to do whatever I want. I am also quite busy during the school which is a good thing for me.

As of right now I've been home for approximately a week and a half and I am already struggling. I am consistently negative about everything, I have no motivation, I having trouble sleeping, and I honestly just feel sad and angry. I hate feeling like this and I'm not sure why this is happening to me. The thing is I have no reason to be like this, which scares me even more. I have a great family and a great girlfriend with some solid friends that live within a five minute drive from me.

The exact same thing happened to me last summer and I would have anxiety attacks about nothing where I would find myself crying. But this feeling went away once I got to school so I basically ignored what happened. I don't know why this is happening but my negativity on life is starting to affect some of my relationships and I hate feeling like this. I know it's only going to get worse as the summer goes on and I'm afraid of whats going to happen.

Thanks for your time.