I don't think there is anything wrong with being evergreen at the age you are right now =) my brother had lots of relationship but didn't feel that actual 'love' feeling until his 22nd bday this past summer =D It always comes out that the longer you wait, the better the thing you're waiting for is.

I hope you hang in there and be happy once your love comes

For puppy love, it was when i was in the fourth grade, but for my first love, it was when I was 12, and still lasting till now (18). [But love isn't perfect or pure happiness, because it lets you experience your worst and happiest moments in life. Like yin and yang; give or take.]
My mother's first love is my father and I'm not sure what age she fell for him, but she gave birth to my brother at 16 ^^;