Nothing beats Say Anything. Two other good ones from the time period: The Sure Thing and Some Kind of Wonderful.

1. "An Officer and a Gentleman" - Richard Gere at his hottest and Deborah Winger as the girl he literally sweeps off her feet. They may not be teens, but they sure feed our young hearts.
2. "Weird Science" - Kelly Lebrock is the guy every high school boy crushes on. She isn't real, so she gives mortal girls a challenge. This John Hughes-directed film is sweet and funny.
3. "Some Kind of Wonderful" - What happens when a girl who's part of the in crowd falls for a social misfit? It's touching and heartbreaking. Another wonderful John Hughes offering.
4. "Endless Love" - Brook Shields and Martin Hewitt are beautiful and torn. It's sappy at times, which makes it all the more a delight.
5. "Sixteen Candles" - everybody's favorite

well, it's a super old post but i'll throw a couple in
Some Kind Of Wonderful
Can't Buy My Love

Well, this is from 1990, but Pretty Woman pretty much sets the benchmark.
It`s far easier to start a war than to end one.

can't go past 16 candles and even pretty in pink!!