Hello! Hoping for great advice.

Hi, i just started playing online casino two weeks ago, after a week playing roulette only i had a great cashed-out profit. I then stopped playing for half a week and began playing last tuesday again ('the second week'). I lost 1000 dollars on tuesday, then i played roulette for the first time and went to 6000 dollars profit (on account, not cashed out) but i did not cash out and got some addict-feelings and
went to zero. Stupid me. After 'losing' this 6000 dollars, i got the feeling that it is so easy to win with roulette that i deposited way to many cash, which i - off course - lost.. so now i do not have a profit anymore, i have a loss... a huge loss compared to my salary..

I will descripe what I did on the several casinos i played in:

PartyCasino.com
First week: Made a profit of 300 euros while playing the roullete system. Works sometimes but some times not.
Second week: Loss of 1800 euros. After Playing roulette for the first time here and having a theoretically profit, i got the addict feelings and deposited way to many, just trying to solve little losses in real money.

Casino-on-Net (888.com)
First week: Made a profit of 1800 euros while playing with the roulette system. Worked fine.
Second week: A loss of 430 euros, with roulette and 'real gambling' on the roulette.
Unibet
First week: Lost 430 euros while playing with the roulette system, it did not work.
Second week: I will not play here anymore.
AmsterdamsCasino
First week: Lost 100 euros while playing with the roulette system, it did not work.
Second week: I will not play here anymore.
Vegas Red
First week: Lost 200 euros while playing with the roulette system, it did not work.
Second week: I will not play here anymore.
GoldenPalace
First week: Lost 400 euros while playing with the roulette system, it did not work.
Second week: I did not play here in the second week.

EuroGrand
First week: Lost 100 euros while playing with the roulette system, it did not work.
Second week: I will not play here anymore.

The times I played Roulette, I played the method of waiting 5 turns for 'High, Low or middle 12' and then place a bet. As you can see, at some of the casinos this method did not work at all, at some others it did. Too bad I did not know this website before otherwise i wouldn't have played at some of some of the casinos I lost.

The times I played Blackjack, I just really 'gambled', I did not use any particular method. Perhaps there are some advices?

Then the most important question: Is there hope for me to win again and turn my losses into profit again? How? Where? ... Or do you guys suggest quiting gambling for me..?

Some other questions: I see a lot of casinos recommended on this website with lots of bonusses. But most of the time these bonusses are not playable at roulette and blackjack. Are there any good casinos you guys recommend where there are no restictions for playing the bonus in roulette or blackjack games?

Hope to learn a lot and looking forward to any reply!