My male friend is acting odd?

I have been friends (with benefits) with a guy for about 8 years. We have not had sexual relations for 2 + years but still flirt, tease and have phone sex (we live in different states). On Sat I sent a text message to him and he answered with a "I can't do this anymore" I asked if it was because he found a gf. He said, they just broke up. I find it odd that he would still 'play' with me while having a gf and now telling me we can be friends but w/o benefits. I asked him today how he was doing and he said okay. Trying to let go of the situation not her. What does all of this mean?