A couple of things for you.
First, Variance is part of poker. Whether in tournaments or in cash sometimes your opponent will play badly and still suck out on you. This is actually a good thing for you. If the fish never wins than they would quit. You have to focus on making the correct play long term and not worry about short term results. If you can't understand that bad beats are a part of the game then you will never make it.
2nd You sound like you need a lot of help with poker fundamentals, that's not meant to be harsh, just a fact. That's oikay, we are all students of the game and constantly learning and this site is one of the best to learn the fundamentals at.
To begin, if I were you I would play no more than two tables while learning, ideally only one table but realistically two is probably ok. Multi tabling is only good if you are a winning player. Other wise it just causes you to lose faster.
I would also switch to full ring while you are learning. Full ring is slower paced so you have more time to think about your decisions. The games play more passively with tighter ranges. Your decisions will be easier. Also, IMO there are more fish at full ring. You can always move to 6 max after you have a better fundamental game.
If you don't already have one get a database/hud either Holdem manager or poker tracker. You can download them free and try them for a month before you have to pay. The key for a newer player isn't using the hud, (although it is important later). The key is that a database lets you capture and review your hands to identify your mistakes.
Post hands that you have questions about in the hand analysis sub forum:
or in the cash game forum.
Ask lots of questions and be open to different approaches. Read hand analysis threads and think about how you would play it before scrolling down and seeing other's thoughts. If you don't understand or if you disagree with something someone wrote, ask about it. Don't be afraid to be wrong. Its really the only way that we learn.
Read the golden archives sub forum. Its filled with great advice that can help your game. http://www.cardschat.com/f49/
Also, here is a further list of great threads broken up by topic. Some amazing stuff here:
Finally, by all means join in on the monthly cash game thread (it will be the one with the ridiculous title) and you will learn a lot. Amongst all of the B.S. ing , video posting, spamming etc you will find some great discussions about strategy. Also, a lot of the guys uses skype to do more in depth strategy work with each other. I'm an old stick in the mud so I don't skype but I hear it can do wonders for your game and I'm sure if you introduce yourself you can get in if you like.
Okay, I know, that was way too damn long.
Here's the cliffs:
Variance is part of poker, learn to understand and accept it or quit.
Switch to full ring while you learn
No more than two tables while you are learning
Get holdem manager or pokertracker
Study hands post hands ask questions.
Read all the links I gave you. Book mark them and study them.
Join the cash game thread.
FML my cliffs are too long.
Good luck OP.