Not to suggest that I really had any to begin with, but I feel like I've lost my game.

I'm a 17 y/o M in my senior year of high school. I've been in a few relationships with a couple girls, but recently I've just had radio silence. The last date I've been on was almost 2 years ago, and it didn't really work out. I know this is my fault, because I don't really meet a lot of new people anymore. I definitely like to think I'm my own person, and I've really come into my own recently. I have my own hobbies, passions, and aspirations, and my friends, female and male have commented that I'm above average in looks. But I have very little confidence, even more so around girls I don't know, and I'm pretty socially anxious. Any advice on how I can improve myself before I graduate, or should I just wait until I'm 18 in a few months to get Tinder?

Thanks.