That's tough when you have to go to show support, but feel awkard about showing "too much" emotion. Funeral really set me off too, after too many close deaths. The only thing that seems to help is doing whatever you can to disassociate from the emotion at the time - saying poems in your head, making lists, etc. The other thing I've found that can help with control is to focus very closely on your breathing. Very slow even breaths, in through the nose (unless it's clogged up) and out through the mouth, gently. Concentrate really hard on just breathing, and sometimes the emotion will pass.