Should I do high school swim team this year?

I really think you should. All of the practice that you'll do with the team is worth it during your meets. I'm sure your not required to go to practice all 5 days a week but it'll probably be recommended. Always tell your coach, if you can, that you won't show up to practice. What my high school team will do is we'll throw a reception for all who participated and their guests. It is also a good time to go to other schools and meet new people. Swimming is also good on your file when looking for colleges (Some colleges look for students who participate in clubs and sports during high school). Don't worry about the hard work outs ether. Once you're done, you're done and it'll be like a memory and will help you improve during your meets. It'll also keep you fit! The meets are also simpler than the practices but you just gotta give them your best and fastest performance. I think it would be a shame if you don't try out if you've been swimming for so long. If you don't like it this year, at least you can quit and say I've tried it! I hope you indeed go for it and think of the positives for this!