You can still lose money and be having fun but it all depends on what you think the money you're spending is meant for. People pay for fun one way or another so you can consider the money that you're using for gambling like you paying for fun and that way you won't think about the expenses that you're giving yourself. As you're playing the game too, aren't you enjoying it? If you're then losing money shouldn't make you stop gambling when you want to do it for the fun of it, you can keep yourself on a budget and not overspend in the casino. People do it always so why can't you, do it too.