Is gambling addictive?

jus came back from burstwood.. it's the 2nd time we went in this week. i've been wanting to go for a long time, cos only went once this sem.. last on monday, colin suggested on going, and we came back with app. $200 winnings each. $100 i gave to jill for her to go shopping.. today? not so lucky. lost $140, but not too bad, cos the other day won. while playing on the roulette, i saw ppl change at one go, $500 - $1000 worth of chips. shoik sia! then i tot in my mind, what would it be like when i started working and have the capital to bet like them? then i wouldnt worry losing the only $100 i have. but again, gambling is a highly addictive game. everytime u lose, it makes u wanna bet more and win back, but when u start to win, u simply cant stop, and wanna win more.. i guess that's human nature, not knowing when to stop.. if only i stop when i was winning and go play something else, maybe i wouldnt lose tonight. anyway, an advice to my love-to-gamble friends, leave to table when u r winning and proceed to another game, i cant tell u why, but i feel this way, u wouldnt be as greedy as usual...