DO I WAIT FOR HIM????? 2008 How do I make hime choose???

Ex love of my life went back to old ex girlfriend 2 months ago. they are both 59. I am 44 and since accidentally seeing him out he has emailed me and txted me over 80 messages and professes his love for me. he states that his girlfriend..he loves as a person but could never be in love with anyone but me. My son loves him too he is 11. My question is...why won't he make up his mind about us. NOW. Says he doesn't want to hurt his old new girlfriend. I have waited and cried for the last 6 weeks. I am a very strong woman who thought I knew what to do. Am getting tired of waiting on the side lines. Have never been this in love in all my life, but it's killing me. HELP please????how much time should he be given to chose???