Love....What is it all abt...

Cheating love! Please help again!!!? My first question was this: The man i was in love w/ has been cheating on me for the past 5 months. How do i deal? Please read on...? He told me he loved me and wanted to marry me but i found out he has been living w/ another woman and they have a 18 month old baby. And we all work at the same hospital! But in 3 different positions and floors. I really loved him how do i deal w/ this???? The only reason i found out was because the woman called me after she found my number in his phone and read the text we sent each other!! Ok well now he called me today (3 weeks later!) and wanted to explain hisself. We talked on the phone for like 30 minutes and we came to the conclusion that we should start off again as friends. Was that right? What should i do?