#5 is a call to see the flop at the very least.
$1/$2 Live cash game and you said you were medium stack? So lets assume you have about 50-60BB left, so between $100 and $120 in your stack , to call the $10 to see a flop and hopefully either flush, or get a flush draw (preferably 2 cards are your suit to have a comfortable flush draw), is worth it. If you hit your flush, you have the second nut flush, only an ace high flush will win against yours, so you're more likely better off paying the $10 here to see a flop and hope. If oyu miss, you miss.
I mean, you're willing to call $15 for pocket 9s in LP, so play your KJs in SB. Yes, you need to act first, but the flops going to give you most of your information. If you flush / get a draw, or even top pair, then bet.
The reason i don't like $1/$2 LIVE CASH games is because its bingo, and not big money. Raising 10BB preflop is normal, making 3 bets even bigger etc and next thing your $1/$2 game has bigger pots/raises preflop then your average $2/$5. This is what I noticed at my casino, it's all bingo and gambling with $1/$2 and I avoid it like the plague.
My advice, you get scared away from bets when you have decent hands.
5BB is a normal raise, don't be scared to call it, and whilst you need to widen your range a bit, it doesn't mean play every hand, but this will all come with time practise and experience! I'm only 3 months into playing seriously (4-5times a week at the casino), and I have come such a long way in such a short time, but I'm no where near where I can be. Just practice!
Also, for future reference, if you can remember flops specifically, it would help! The more infortmation the better!