Congratulations on graduating!

I think you deserve to have good friends who love and care for you. I understand you liked this person, and it might even be low self esteem that makes you think the person doesn't like you back, but if they genuinely aren't really that close to you, for whatever reason... I say, try not to dwell on it too much. You will go on and meet REAL friends, I'm sure of it.
It's sad leaving school, but I think the people you are MEANT to stay in touch with, you will. If you don't stay in touch with somebody there's a reason and that's ok.

Well, I hope you can relax and have fun for the summer?? You deserve it x