How can i help the guy i like relize that i'm not gonna hurt him emotionaly like all his other exes?

I have been seperated since may and have since met a realy nice guy. We get along great, but the problem is his wife left him in july after not even a month of marriage so that has hurt him greatly.He has alos had a past history of jusmping into relationships quicky and wants to avoid that again. I have told him that there is no harm in dating and taking things slowly, i am not asking to move in together or anything like that, I just want to show him that I'm not like every other person he has been with. He know 100% how i feel but says hes not ready to committ to anything and likes his freedom-he is seeing another girl as well and is ualy active with both of us.Any advice