my boyfriend cheated on me.. He was at a concert and a girl who was flirting with his friend said goodbye and then kissed him.. He said he didn't provoke it but he didn't stop it either. 4 days after it happened he confessed and said I needed to find a new guy one whom could be there for me. He also said a bunch of contradictory statements.. It hasn't even been a week and many things have happened. One including him breaking down and crying to one of my friends.. In public...another one was venting to are mutual friend about how he f***ed up his life. He wants me back now.. Should I give him a second chance?