Hi, /fa/. I've been trying to grow my hair long for seven years. I started with my hair barely touching my shoulders and grew it to its present length in about two years.. It seems to have completely stopped growing. I get it trimmed once a year and let it grow otherwise. Is there anything I'm doing wrong? I'm considering getting hair extensions, but I don't want to spend the money if I can get the length naturally.

Pic related, it is my hair.