My Ex-boyfriend says she not his girlfriend?

I have been seperated from my ex for about 6 mths, he left to go stay with his sister b/c he got in some trouble with the law, so the other day. I went to his mom house to get the rest of my clothes and she was on the phone talking to him, and he ask to speak to me so I talked to him for a minute, and he wanted me to come to visit him for a weekend.So I end up going down there to see him, and he was like he so glad to see me he sorry for everything he done to me.He wish that I come back to him, I was in love with this man I still am in love with him but he was no good for me he cheated, lied , abusive so when he got in trouble with the law I felt like that was my way of getting away for him, so I noticed that when I pulled up he was talking to this girl and when I got out the car he walk over where I was and hug me, and he introduce me to all his friend and when he introduce me to them he said that I was his girl and she just look at him funny, and then she look at me and made a cont.