Aww... I think it's cute that you wanna make her laugh! My bf and I have different senses of humor- he likes silly 'funny' stuff where I tend to appreciate witty randomness. I get his jokes and he gets mine, but it's not like the best joke we've ever heard. But I've noticed there's a place where our senses of humor kind of come together. When we both laugh at something, it's a often a blend of the two and its when I feel the closest to him. If you like this girl and you can appreciate her sense of humor even if you don't exactly 'get it', I say keep trying. Maybe you two can find a happy medium.