I play rec coed soccer with this guy from my college. We are both 21. We have known each other for a little over a year. We used to both be very shy/awkward around each other, but we both are social with everyone else. About 6 months ago, he added me on social media and the past few months he has become much more talkative and will come up to me often to initiate conversation or tease me. The past couple weeks he has really started to tease me/joke with me and has silly (but not mean) nicknames for me. He doesn't treat any of the other girls this way. I can't tell if he is just being friendly and treating me like "one of the guys" or if he could be interested in me.