How to allow myself to love and live?

Well, recently, I started talking to this woman (she lives in another country). I have been able to meet her, and not catfishing happened. The problem is all my insecurities pop up like: I wonder why she isn't married, does she really like me for me (or what she thinks I can offer her), is she possibly playing me for a fool and has another guy, and is this one sided. These are thoughts that pop into my head and prevent me from fully going in and opening up. Additionally, like the first girl I ever loved, I don't have those feelings, which make me nervous. I want to get married and see where she is a wonderful person. Right now I'm just so on guard and don't want to, be several years down the road and starting over. I want to get it right the first time. With that said I'm afraid I will miss out with someone who might be the best thing to happen to me and never get married. I need advice. How do you get through the sea of feelings and insecurities?
How to allow myself to love and live?
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