A little advice is needed!

Ok,Let me get your advice on this.First of all let me explain my situation.I recently got out of a 5 yr relationship with someone who I thought was my world.She was leading a sort of secret life which I didn't find out about until 6 months ago when I then ended things.She was married all the time I was with her (I didn't know) and kept her life a secret.It really messed me up inside.My prior relationships were very bad.Not that I've had that many but the ones I've had all ended,either due to my prior drug/alcohol abuse (sober now for many yrs) or because they cheated,lied or left me.This last relationship really really messed my mind up and I find it hard to trust anyone anymore.The thing is,there is this lady who I've known for many years,she is from the Ukraine but has lived in the states years now.We are friends of friends kind of thing,she knows some friends that I know,but we don't directly know each other.Anyway,we had started talking to each other recently and I enjoy her company.I am wondering if you all think I should ask her to dinner.I am a very shy,quiet person but a part of me is very afraid to be hurt again.What do you all think I should do? I'd like to get your feedback on this and then make a choice.Thanks for your time :)