look at how you have "sold" yourself on your online profile too - maybe they are getting mixed signals from that>?
If you are " sexy minx, 32, looking for fun and frolics and maybe more" then you are going to attract that kind of men.
If you are "lonely single mum, 32, seeks kind man to mend a broken heart..." then you might as well stand with a sign saying "DESPERATE - will shag anyone who is remotely reasonable".
You need to go for an assertive and sensible "generously proportioned 32 year old seeks fun loving, sensible and sincere man for friendship initially.." type ad that doesnt make you sound like a sex crazed bunny boiler or lonely hearts club founder.
Treat every new date as a job interview - most decent companies will have at least two interviews before an offer is made, and only then would you consider that offer...meanwhile, if you were job hunting, you would still be going to other interviews.
This way, you can sit there confidently and let them know they are not the only person on offer (you are a gorgeous lady remember) and that you are auditioning them for the role of companion - and that there are others being considered....
Try old fashioned ways to find dates too - let your friends know you are single and looking, and see if they want to set you up, maybe in a double date scenario.