<human>: Condense the text into a few key points

6 years ago the guy who had been my best friend for 2 years asked me out (I was 17, he was 22). We were happy for awhile until I found out he was sleeping with other girls behind my back. I took him back 3 times without question because he claimed "we were never formally dating." 

A year ago he came back into my life and told me he always had real feelings for me and wanted another chance. I let him because claimed "he had changed." 

2 weeks ago I found out through a friend that he is once again, dating another girl. He quit talking to me altogether (like he always does when he finds someone else) until 2 nights ago, he was texting me selfies and talking like nothing happened. Last night I asked him why he didn't tell me he got another girlfriend and his reply was "you never asked." 

Should I even try to salvage the friendship?
<bot>: Dated a cheater, gave him chance after chance only to be told the reason he never told me he was cheating was because I never asked. I'm an idiot. Don't know whether the friendship is worth it.