There are cases of addiction but like I said, it depends on an individual with how he can control it.
I don't regret knowing about gambling because it somehow improved the entertainment factor of the sports that I love. But I bet as moderate as possible so that I won't get too hooked with it.
Even if you come with someone's invitation in the end you can't fully blame that person, because after all this all happens with the consent of yourself most of the responsibility you will bear yourself, the bad effects of gambling are very common and I think from the beginning you should have known the negative side, and if you really don't know about all the risks involved in gambling then it seems like you are not smart enough to think by coming only because you see the chances of winning and without thinking or just suspecting about what negative effects are there and which will very likely happen.