I'm confused and looking for answers

If you are lonely, can you have interest in gambling simply because of your loneliness?

How would you judge someone who says they don't gamble because it's fun, is that a sign of a gambling addiction?

If you are making $600 a day, that's $20000 in a month, and because you are only you start having interest to gamble, what do you think this is?

All these questions is been asked because someone close said all these and I think he are losing money and losing himself too, of all the discussions we had, these are the points I held unto.

Later he open up to have been using $500 for gambling per day, he said all these started when his wife left him, that he isn't into gambling at all, but I can't ask why his wife left him in the first place, but does loneliness make people become addicted to gambling or it's something else.