learn how to play an instrument! this is one of the most profound use of time in my opinion. you don't need to play with other people (although that in itself is also amazing) but the constant discovery of how creative you can be is fulfilling and fun.

try playing another class
#yolo

Find something that you are passionate about. I know it might seem hard to pick a major that might not make you a lot of money, but so many kids end up going to to college to pick a major suggested by their parents only to burn themselves out, drop out of college, and lose multiple years they could have been using to build up work experience. A bigger paycheck isn't worth hating yourself 8 hours a day 5 days a week.

Set some goals and keep trying new things

Make some of your own music - originals, covers, anything - try some video games of genres you've never played before, or speedrunning games you've already beat. Try to be bilingual or multilingual. Try skateboarding. Good luck on finding and holding on to an interest - though you may just be burnt out from high school now that you're a senior. Senioritis hits hard.

Hi Mr. Groove, my name is Goldy and I would like to input my thoughts

I'm only 20 but I was pretty much like you in high school in regards of finding a lot of the things that I do that became pretty bland over a while and as well as not being able to decide on what I wanted to do with my life. Being raised in a Chinese household, my parents expected a lot of things out of me, especially regarding college. They wanted me to graduate in four years and then pursue a higher degree in a field that would net me loads of cash. I've always loved helping people, and why not make money doing it? So I declared Psychology as my major, with hopes of working in Clinical down the road. Over two years, I realized that I wasn't really all cut out for Psychology (but hey, it's a pretty tedious field). But, I've recently switched my major from Psychology to MIS because I realized it was something I wholly enjoyed learning and doing. So regarding college, take your time and get the prerequisites out of the way while slowly finding yourself and your passion. As long as you work hard and enjoy what you do, the money will follow. Like Childish Gambino aptly said, "Don't be mad at me cuz I'm doing you better than you do", you shouldn't compare yourself with others because the others aren't you.

Now regarding your boredom. Like many of the other helpful comments sans trying meth have stated, try something new! Explore and take that small step outside of your comfort zone and try new things. Cooking, sewing, dancing, achieving a new ejaculation distance, etc., are few of the many things that I've tried just because I thought life was bland as fuck. Hell, I've even learned how to skateboard over the summer and now own a longboard that I use daily for commuting across my campus. Nothing bad will come out of it and you gain two things out of the experience: knowledge and an increased understanding at why others do it. I am also glad on how you stand with the whole point of getting a girlfriend just to have one is good. My dad always said, "Son! How can you love someone if you can't even love yourself!?" So that's great! Find yourself as a person and learn what you love and what you don't love. Like how I stated in similar fashion earlier, focus on education, your health, your goals, and becoming yourself to the point that when others look at you, they'll be looking UP to you... Then the ladies will start coming to you.