What would u have done in this situation?

[nightlyraver]

A few things to consider:

First, when it's folded to the Button and he miniraises, this usually indicates real strength or real weakness. I like to default to the conclusion of real weakness and find out where I stand. Thus, I'm usually inclined to reraise in this spot. You have a hand thay may be best or only a slight dog, but it will be difficult to play it out of position unless you flop a real monster. The reraise is also a nice cheap way to find out exactly where you are, may cause the Button to fold a slightly better hand (like 55, or even KJo) and mostly shuts out the BB who could easily fold a better hand after a raise and reraise.

Second, once you flat call and the BB reraise, you're getting about 3:1 on your call to see a flop. However, I think you really need to flop to this hand pretty nicely in order to feel comfortable. That, combined with the fact that the BB is the only other big stack and he's tight would usually lead me to a fold even with the good pot odds. When I'm in such a great chip position, I'll usually dump marginal hands like KTs after the other big stack reraises. It's so unlikely that he is bluffing and you could easily be dominated. The flush possibilities are not strong enough to dictate a call with only 3:1 odds.