I have no friends this summer and I'm scared I'm going to be treated as a weird kid again

Last year all I focused on was getting that girl. And looking back on that I just ignored all my friends and just tried leaving them behind because this girl I was trying to get with was mad popular and so they all just left me, and I had one friend that I've had since freshman and he just bailed on me after he got with the wanna be gangster guys . So now it's summer the girl didn't get with me and thought I was gay.. I have no friends and pretty much nothing what should I be doing to get back to being a ordinary guy with friends .