How to get over the fact that I cannot be the best at anything and I need to let go of the past?

I've been watching 'Make it or Break it' and feeling horrible about it all. If I had one wish in life, it would be to be flexible again. I took gymnastics my whole life, until middle school and when I moved where I am today. That was a long while ago, years and years. I was so good! I loved it, it's independent and I hate team sports, I could do splits and back bends, and I was actually good at something. Now, I can't even do a cartwheel or a split. Or even close to a split. I do play a sport, tennis, and I'm good, but I'm not the best out there. I mean, I got 1st place in a group this summer, 24 other people. But on my school team we have the rich snooty tennis people, and I got pushed back to #1 girl on team two, even though I beat other school's best players. I just feel like I need to be good at something, or distinguished. I am good at writing, but now none of my writings were chosen for a special honor, while a straight D students was, which made me happy for them, but still. Just things like that. Maybe it's just my personality. I am good at a lot of things, but it just seems like I'm losing it easily. I'm in tears now, it's horrible.