Haha, great reason. I liked Alex, and felt really bad for him, but I honestly don't understand people who try to wriggle their way into people's affections. I always hate when characters foolishly risk their life just to impress a girl. I mean, you, as Lara, can survive ridiculous certain-death situations because you're in a video game. Something tells me that Alex wouldn't have had any problems finding women by just being himself. If he'd lived, I could see Lara dating him when she wasn't off fighting to survive. Sigh. At least he went out with dignity, though.
Other than that, I liked Roth and Jonah because they felt like the only other characters who were pulling their weight. Whitman was unlikable from his very first moment on-screen (which says a lot about this game's direction and voice talent) and Reyes was too much of a jerk to be likable. Even though you barely saw him at all, that Scottish guy was pretty badass, too. I loved his authenticity. He talks a lot like my uncle (who is 100% Scottish. I'm 1/2 Scottish).
I have to say, though, that I still never truly cared about any characters as much as I cared about Lara. Seeing her in constant physical and emotional agony tugged my heart strings. My eyes burned with sympathy when she has to cauterize her wound with an arrow even on my second play through.