tough decision. main pot against 2 players is not good. likely some over card will hit board. side pot, I like your odds better. since you don't actually give stack sizes, let's make some assumptions. let's say short stack has half your stack. so side pot most you can win would be equal to the half you have left, which is break even. again chances of winning 3 way pot with overcards hitting board arent good, so main pot too risky to chance,you lost your chances of getting a read with no preflop raise. I fold and learn from not raising preflop.