I think that since you have finally found a guy you really care for, that you are worried you'll lose him. By asking questions like that you feel unsure about yourself and you may not have come to terms with your past. What you really need to do is tell him these things. He needs to know that even though you may do this, that you really do trust him and that your just worried you'll get hurt like your other past relationships.
Communication is key in a relationship. Tell him how you truly feel and reasure him that you trust him.
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