Please don't think too much. Look at your description. The girl I met in the gym. It's not necessarily interesting for you. Maybe I'm talking to you out of courtesy. But there is one thing that makes you happy. At least the girl doesn't dislike you. Willing to chat with you. If you want to have sex with a girl. You should continue to try to chat with girls and get to know each other. Find the same topic. Further deepen friendship and relations. Only in this way can we succeed slowly.