I'm dating a guy my age we are both 28.I just got out a marriage of 4 years with a man 36,my boyfriend now 28.talks about if I want to marry him I need to lose weight.I have 4 kids in six years.I'm not obese just a little over weight.if he not the one please tell me thanks

Doesn't sound like it to me, as if he was in love with you enough to marry you, he would accept you, as you are. What if you lose weight, and he finds other conditions for marriage for you to meet?