So what? Even if you were a 200 lb 12 year old we wouldn't judge you any differently.
I went through the same thing when I was 12, believe me when I say, you'll come crawling back to tennis.
Yes, come crawling back, and then quit again...
When you hate tennis, but have 'the gift', you may return, but so will the hate. When you take it up again, you will have some success, but the hate of the game will come back. And, if you are smart, you will quit it again.
The beauty of this situation is that it helps provide 'closure' on your earlier quitting. Some of us quit the game as a youth, and always wondered 'what if'. We take it up again, and realize why we quit in the first place.
Tennis is the most beautiful of sports, but some of us just have too much of a hate/hate relationship with it for playing. For those of us who hate it, we need to get out.