Sometimes romances happen in the summer. You meet someone on vacation or tanning at the beach. Summer can be the best time to be single.
The pros of being single in the summer is it gives you time to focus on yourself. You have probally heard it a million times, even if you don't want to believe it. "You can't expect someone else to love you, if you don't love you." Use the summer to fall in love with yourself.
Change your negative mindset. Make yourself see that you don't need a guy to be happy. Work out and do whatever it takes to make you feel great.
Flirt with as many different guys as possible. Date around, don't sleep around. The more variety you have of guys the more you see which ones you are attracted to.
You could go away without your guy and not have to deal with "who is going?" You also don't have to worry about a guy going away with his buddies alone. Of course if you don't trust your guy going away than you shouldn't be with him. If you don't have trust in a relationship you have nothing.
This summer take time to focus on yourself. Take a break from guys and make yourself happy. Love is great but don't make a guy your world. Remember you want a guy but you don't need a guy to feel loved.