Do cheaters change?

Was dealing with this guy who led me to believe he was just supporting this woman until she could get back on her own, told me they were having too many problems and the book was closed with her. One night they got into it pretty bad and the police were called and they told her to leave. So he calls me and wanted to spend time with me and we did. A week later he tells me she is moving back in, he's in love with her and its the right thing to do since he has "equity" in her. To me that sounds like bs because equity doesn't stop people who have been married for years from divorcing. They were only together for a year. During his time away from her it seems he used it poorly he used me and led me to think it was going to be me and him but while i was at his house during this time he had another woman stalking him and calling and hanging
up! If he was so in love why did he do this to me and the woman stalking him? He's so in love but he cheats on her, uses prepaid phones behind her back, has an online dating site for which he pays for ( this is how i met him), etc. i feel bad because i was attracted to him and he used me. But i keep thinking he used me and this other girl and now he's gone back to the gf ad a changed man but do cheaters change? He 's hid his facebook page again, changed the phone number to his house as if he has changed BUT he has done this before. Since i've known him for less than a year he had changed that phone number at least 3 times and continues to buy prepaid phones yet he is so in love. I think he may be a bit controlling as well! Am i doing the right thing to rid myself of him? Do these types of guys change?