How do you know if a Pisces Man is interested?

How do you know if a Pisces man is interested? I went out with one and please don't tell me how stupid I was, but I slept with him on the first date. He kept touching me and played on his guitar and sung to me. I sent him a text the next day saying that I had a great time and he texted me back saying that we need to get together again soon and next time he will make me dinner, etc. Well, we slept together 3 days ago. We texted 2 days ago. I have seen him commenting on some other wonan's posts on FB, that I know he has slept with and he says stuff that really upsets me to her. I realize 2 days isn't long enough, but I am concerned that I haven't heard from again. I was tempted to text him, but I don't know if I should. I have no idea if I should chase or let him chase me. I also haven't texted because of the comments that I have seen him make to the other woman. I don't want to seem pissed off, even though I am and I know I don't have a right to be.