Hey guys, I'm 19.

This is something I've noticed in myself over time. I recently started university (college) and I'm talking with a lot more girls now. What I noticed is that after I talk to a girl I like or even engage in a lot of social activity I can feel very tired. And this is not a great thing as if I feel lethargic and tired I can't be that fun or engage in interesting conversation. I lose my wit, my carefree smile and my energetic attitude - which is what I'm like around most of my friends. I also noticed that I often take constant sips from my water bottle and urinate frequently when around women in a public/social setting that I like.

As an example after having lunch with this girl I met today and a few of her friends and then getting her number afterwards I had practically zero energy. I got home and wanted to do some of my coursework but literally just got into bed and napped.

Does anyone else feel like this? Am I doing something mentally that's draining me? It's really intense. It's like I have no social/seductive stamina.

Ps. I was in a 2 year relationship and didn't feel much like this during it.