I think the rumor that she said no isn't true.
I was reading a bit on the television without pity forums
: and they made some really good points:
-ultimately Andy loves the chase and Tessa really makes him chase her while Bevin just made it so easy, he didn't have to chase her at all. Bevin was more into Andy than he was into her and ultimately it was a turn off for him.
-that Tessa is "above" Andy in terms of class/money, which makes her a really great catch (to him) and a challenge. This also explains why her family was so cold to him (I didn't see that part), to them guys like Andy are a dime a dozen.
I can't remember what else...when I was reading it last night I was thinking "oh yeah, that makes sense!" but now I can't remember the rest.
I do hope they make it.
ETA: I watched the recap last night and I was impressed with the way Bevin handled herself. She was very classy about it. Andy...not so much. I was bugged how he kept touching her knee and then when she said "Some things are better left unsaid" he had to shoot off his big mouth anyway. I just thought it was disrespectful. She deserves someone less flirty/more respectful.