if they are sucking out on you thats a good sign. It means you are putting money in with the best hand. It is much less of a problem in cash games than tournaments because you can just rebuy and carry on.
If you are tilting and playing like them then take a break. It sounds like discipline is where you are struggling. Take a look through some hand histories and make sure you arent putting money into the pot AFTER they have "sucked out" on you. If you are then you need to stop. Take a look at aoks how to plug any leak in 10 minutes thread and write yourself some stickers.