Most people are too stupid to do the smart thing and walk away from this kind of thing, there's a 90 percent chance that you are one of them so I'm just going to tell you what's actually going to happen.
You're going to most likely let him fuck you, then get thrown to the wayside like a sack of bricks like the rest of the girls on his list, forever forced to live with the fact that all you ever amounted to with him in his eyes was just being a single tally on his scoreboard.
Depends on the kind of "player"... players do change, but you have to know how to play "the game" and that takes a long, long time... especially if you meet a Real player. hard to outplay a real player, he/she will see you coming. you can outplay a fake one, they break easy. safest option is to leave. i mean, if its some wuss that just flirts around, that ain't a player... you Rarely ever know a real player until the big reveal... at the END, not the beginning. been there, done that.