Boys are stupid.
I found that it was rather hard to get close to any boys at school because I was so busy with gymnastics, but also because many of them were scared of me since I could bench press their body weight back in 9th grade gym class.

Most high school boys are too insecure to be with a girl that are stronger than them.
With all that I did manage to find one last year who actually had some muscle on him and he asked me to the winter formal. We went to a couple movies and started dating the day after Christmas. We were both very very busy and we knew that going into the relationship, so we spent what time we could together and walked to classes together and such. It wasn't really a strain on my energy because I enjoyed spending time with him. The winter formal was amazing and it was the best dance I had ever been to. We made plans for me to go to his diving competition on Valentine's Day and he was going to come to my cheerleading competition the day after. When I called him the night before Valentines to finalize transportation plans he dumped me.
The next week was winter break and I did 17 hours of gymnastics to keep myself distracted. My first level 7 competition was 3 weeks away and I needed it. I was fine as long as I was in the gym, but school started again after that week and it was the most horrible week of my high school career. He wasn't disrespectful in anyway, but the very sight of him made me agitated. I really couldn't enjoy any end of the year activity he was at because I felt worthless when I was around him. I can count on my fingers the number of words I have said directly to him since February 13th.
The moral of this very long story is that boyfriends can be amazing, but keep your guard up because dealing with break ups can really put a dent in your self esteem. I thought I was keeping my guard up and I never thought he would dump me out of the blue, but he did, and I know I would have enjoyed my senior year a million times more if it hadn't happened at all. This wasn't someone I barely knew or anything, I sat next to him in English class all the previous year.
So as long as you have time for it, boyfriends can really help improve the balance between gymnastics and normal outside life, but keep your guard up.