Gambling is just something fun that my two friends (Daouda & Koffi) make me do each time I am around them. For me alone, I am not too into sports, so when it comes to gambling, I even find it difficult to note some terms, let alone knowing how they work.
My girlfriend always says that she will keep malice with me if she finds out any day I gamble, so even when I am out to have fun with my two guys, I don't let her know I am out with them. But anytime I see myself gambling, which is only when I am around them, they help me out and it's always fun, we lose and we win.
This is what they say that our friends can influence us on what they are doing. So, let's make sure to choose the right set of friends if you don't want your life to be miserable. Like you, I am also not into sports and I never bothered learning it. Besides, learning it can only make me addicted on it and that means another expense, so I am fine with casino games.
You should also enjoy what you love and don't let others dictate you. I see that you also have a non-supportive girlfriend when it comes to your hobby but you can choose now if which one is you truly love. Was it gambling or her? And you should only pick one before it gives you a problem later on.
The problem now is picking in between either your friends or your girlfriend. Gambling supposedly for fun and entertainment, but once you get addicted, it will bring a lot of problems in the future, like what I mentioned. It's between your friends and your GF since they both have an influence on you.
If you will choose your GF, then quitting into gambling will be your next direction, while choosing your friends, only means that you will continue your gambling and will be going deeper.
Either side, it will affect you and you needed to pick the right direction to have a better life.