Paris only wants him because she probably wants everything that's Lindsay's; he's a royal jerk if he's really flirting with Paris while dating Lindsay, bot on the other hand, Lindsay really can't say much if she's been flirting with others even half as much as the gossip claims...
They're a mess, but yeah, if I have to choose, I'll back up Lindsay against Paris any day. Lindsay has talent and she has actually done somethinbg to merit her fame, even if she's well on her way to blowing a very promising career; Paris is just shameless.