If you are constantly negative about everything you are not going to have a good high school experience. Not only will you always be in a bad mood but nobody will want to be around you due to your constant negativity. I used to always focus on the negative things and it got me nowhere but in a bad mood and with no friends.
If you are a positive person people will like you and want to be around you all the time due to your positive attitude. Some days I try to be a positive person and a lot of people talk to me and act like they like me.
You will go through loads of stuff in high school. While you're in it you might thing it's the worse but once you stop and look back and at the memories and new friends you've gained you're going to realize it wasn't that bad. I used to think high school was the worst, I hated the people there, I hated going there five days a week and I hated just having to sit and learn for eight hours a day but once I stopped and thought about it I realized there were some good parts to the high school experience.