What's wrong with me?

I feel like a problematic person, I can't build meaningful relationships with people, I mean I don't socialize, I don't mingle. I don't think I have social anxiety, because when I need to ask someone something I can ask them comfortably and I don't feel nervous when I'm in social situations, but I can never build meaningful, deep relationships, I can't succeed, I can't make new friends, I can't make a girlfriend, I can't flirt, which is the most upsetting point, I'm 19 years old and I've never had a girlfriend in my life, in fact I've never even had a girl who was my normal friend, I've always been distant to girls and as I got older, this situation started to hurt. This situation makes me feel very depressed
What's wrong with me?
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