I know exactly how you feel... And I kind of found out God doesn't expect us to be perfect, as well as He knows we can't be perfect. And I guess we don't have to be the best in anything, God wants us to make the difference, not to be better than the non-christians.
That situation about parents usally happens when you're a good daughter/son xD, and I'm sure you do have to talk to them like NoTearShed said.
Our parents usually want the best for us, and for this reason they want us to do the best, to get the best, or something like. I try to use examples when things get to bad about asking for more than you should/could do. Cousins and friends your parents know are a good beginning haha! In the situation above I could say, for example that I have a 27 year-old cousin who lives with his parents and doesn't even work. HAHA
A little testemony once I'm writting here haha:
Last year I almost gave up my college course. I wasn't liking it, I was starting to ask myself if that was really the right choice and I began to do badly at college, skip a lot of classes and stuff. I got really low grades on the first tests (we have like two grades to make the final grade in a subject). We need 7 points not to have to take up that subject again, and my grades were around 1, 2 and 3. xD
When I was almost taking the last tests I decided to talk to God about it.... And as I couldn't decide if I was going to keep there I just asked God if He would help me if He wanted me to keep coursing IT.
To sum up, I just unbelievably got the average in all the subjects. And the only thing I did was to study a little bit more and seek God's will... so I guess it's about seeking first God's kingdom and not about studying hard to be the best student...
I've never heard about a verse or book on the Bible that tells us to BE the best. On the other hand, Mattew 18 says
4 Whosoever therefore shall humble himself as this little child, the same is the greatest in the kingdom of heaven.
To humble myself I think is not to be the best (and feel like the best)
I don't know if I could express myself well, but hope you can get to some conclusion with the huge post haha!