Your friends are being ridiculous and, more to the point, they are missing the point. You will get into plenty of colleges with a 3.7 or whatever conforms to an A- average. You may even get into some of the best colleges in the country.
When grades are that high, the difference maker is not skimpy thousands of a percentage point; the difference maker instead is other things, including:
- SAT scores, but that's a similar issue to grades when you're talking about the population with the highest of the high marks
- Admissions essays
- Desire for incoming class diversity
- etc.
Financial aid isn't supposed to matter at the Admissions level and hopefully it truly doesn't.
If not having an absolutely perfect transcript concerns you that much, make sure to apply to at least one or two "safe schools". And take heart -- many of us did not have perfect transcripts and we still went to college, and rather good colleges sometimes. Check this link out if you still don't believe me:
http://colleges.usnews.rankingsandreviews.com/usnews/edu/college/rankings/rankindex_brief.php
So relax and tell your friends they're wrong. Because they are.