It is NOT all your fault if you get used. I think getting a dog is a good idea. It sounds like you need unconditional love and companionship and a pet can provide that. It is NOT your fault if men have lied to you and abused your trust. There are things you can do to lessen the likelihood it will happen again but there are no guarantees. The very nature of putting ourselves out there puts us at risk of being hurt. Some people take for granted how easy it is for them and like to place blame on people who it's less easy for. You mentioned you don't have a personality but please forgive me for disagreeing. You sound like a very smart, sensitive, caring and INTELLIGENT person. It sounds like you've had some bad luck in the men you've met and that can really color our reality. If you want love and companionship then I feel you deserve to have it. Maybe you need a break right now to heal the wounds of that previous relationship where that man unfairly used you.

Most people have things they could work on....I'm not saying you don't. But please don't blame yourself for trusting someone and them using your trust for their own gain. That is not your fault, it's theirs. (((Hugs)))