Do I have low testosterone? How to increase?

When I was younger 13-16 I remember wanting to talk to 100 girls at a time. I would be ready to go at any second. A girl hugging me would turn me on. I got a girlfriend at 16 and was with her for 3.5 years. Ive never really had an issue getting hard with her. But after we broke up. Things started going down hill. I moved out of our apartment and back home. We’ve been broke up for over a year. Ive tried to meet new girls but I have no desire anymore. Ive tried to sleep with multiple females and couldn’t even get hard. I dont really have a desire to masturbate anymore. But I do occasionally. Maybe 1-3x every couple weeks. Sometimes. I dont smoke, and I just turned 21 so Ive started drinking a little. But nothing excessive. Usually on the weekends. Any advice would be appreciated. Im not sure what to do. Thinking of seeing a T Doctor but getting medicine worrys me. Depression has also been a big issue.