Hello awesome people!!!

I'm a Production Assistant in scripted television, I live in Los Angeles CA. I'm still a PA so I don't make much money. Anyway, my gf invited me to San Diego with her last weekend. We had such a great time, but because I have basically no money I didn't contribute very much. I split the bill at lunch, she paid for dinner, I paid for the drinks at the bar that night, she paid for the Uber back. Anyway, I'd like to help more, I'm just paying for a lot like rent (rent in LA is NOT CHEAP), car payment, car insurance, phone bill. You know, bills. I just felt kind of bad earlier because I suggested we go to Vegas next month and she said: "I'm down to go to Vegas if you feel like you can financially contribute to the expenses". Made me feel way bad. Anyway, She always wants to go out and do things which is fun!!!!! I just really don't have the extra money to ALWAYS do those things. I'm not sure she understands "adulting" she lives at home with her parents, she's on her parent's car insurance, her car is paid off, and she has no bills but a phone bill. Also, she's at my place 85% of the month EVERY MONTH and I never asked her to pay rent. IDK maybe I wrong I get that I should help more. I just want her to understand things.