<human>: Condense the text into a few key points

My now ex-girlfriend [F17] of 8 months and I just severed ties for good, and I feel crushed among other things. She was my first and only girlfriend, and I really felt connected and bonded to her.The past 8 months were the happiest of my life and now it's over. 

I understand that I may sound like a melodramatic and whiny teenager but this is how I feel. I wasn't unhappy before we dated, but I wasn't happy either. I felt lonely and like something was missing in my life. 

When we were dated I felt complete and content. It was the first time in my life that I was consistently felt happy. And now I'm back to square 1. 

I understand that what I'm going through is an experience that everyone goes through, and that it is nothing compared to some of the other problems posed on this subreddit. With that said I still feel awful. I am also worried that I might have a problem as I am not sure how to be happy single. 

So going back to the title, how do I learn to be happy single?
<bot>: my first and only girlfriend and I are through, and I have a bad case of the feels. I want to learn how to enjoy life without being in a relationship.