This is so true at any age. I am experiencing these thoughts and emotions now, having recently met a very nice lady. I find my brain to be full of assumptions, uncertainty, and challenges to my self confidence. AND I KNOW BETTER!😂 This awareness is definitely helpful. I can see all this for what it is- years of mental coping mechanisms rearing their ugly heads. That lets me have very constructive conversations with myself. But it does not make the feelings go away. Some things are hard wired. We are funny beasts.