If you are going to be meeting people you've been in touch with online make sure you're very careful, as they may well not be who they say they are. Meet somewhere public, don't go anywhere private with them or in their car, let someone know where you're going, even take a friend with you at first, make sure you find out (with some evidence) about them etc, etc, etc, Sure you know all this but can't emphasis how important it is. Check online for some safety tips. You've been through enough already!
+ if you feel anxious or a lack of control in relationships just think of some guidelines which will make you comfortable, explain how you feel to the guy, agree the guidelines and review them yourself as the relationship develops.
Also try and have open communication in a relationship and you may feel more secure.
Best wishes.