Peej or shulkie, depending on how they're drawn. If Shulkie is drawn like OP I'd have to vote for that, but Peej is a close second.
The kind of relationship is like OP's picrelated - gaming together on a couch. I want a best friend you fuck, none of that "love at first sight" bullshit.
As for surviving that nonsense - maybe? I'm not worried about getting squished during sex. Getting fridged is maybe a concern, but people who hang out with the hulks for long enough seem to end up with hulk powers. Not sure how fun that would be - I could wind up a mindless rage monster, or just a bigger technicolour version of myself.
With Peej I'd definitely be in danger of being fridged or just randomly disappearing when the series resets and the new team decides to go in a different direction.