Need advice on how to be friends...?

My friend and I had this weird overtly flirty relationship over the past year yet nothing happened. We got into a fight and did not talk that much over the summer. I was able to get over him this summer. Unfortunately, I think I got "too over him" to the point that I don't even try to make eye contact or keep the conversation going when we talk. Am I just over truly him or is this a way of masking my hurt feelings? Any suggestions on how to be friends with him again?