Story time!
So over the weekend I kidnapped my best friend and sat her down for a Mass Effect marathon. She'd never even heard of the series before then, so she went into it completely blind, and I did my best to keep from influencing her decisions so that the story would be her own. I even managed to suppress the urge to cry out my love for Garrus...at least until we got to ME2.
Yeah, then my cover was blown. Best Friend quickly caught on and started poking fun at me; she liked Garrus, but had romanced Liara before and was quickly developing an interest in Thane. It was strange for me to sit through a playthrough that didn't end in FemShep/Garrus, but at least this way I'd get to see what a ME3 playthrough was like without him!
Then, as we neared the end of the game, I noticed that she started taking him on almost every mission; on the SM, when I suggested either Garrus or Jacob for fire team leader, she frowned and said that she wanted Garrus to be with her. She then did so, and kept him all the way until the final boss.
Remember the final cutscene where the platform topples and a squadmate falls down it? That ended up being Garrus. Best Friend was quiet right up until the moment Shepard lost grip of his hand - and then she jumped in her seat and yelled. Of course, Garrus was fine, but Best Friend turned to me and said very seriously:
"Oh my god, I was going to punch a hole into your monitor.
Right there, I'm not even kidding."
The moral of this story? Make sure Garrus never dies, because even people who don't romance him will damage your property if he does