I don't know what to do right now

Tdiva

so I have a crush on my guy friend but he has a girlfriend and I just get so jealous when he talks about her I mean he don't talk about her often but when he does it makes me so mad. I don't want to make things complicated because he only sees me as a sister but I don't want him to see me that way😭 because I like him a lot. Do thing I should tell him I have a crush on him or let them stay together??