Should I confess my feelings towards my female friend who probably still has a boyfriend? What do you think?

Initially, I didn't have any feelings towards her, I just thought of her to be a normal female friend. Until a few months ago, when I started to see her more mature and behaving very responsible and even commendable in some situations which made me think that she is an amazing person. The thing is I don't know if she is still with the guy she was dating. I don't even know if what I am feeling are actually real feelings or just infatuation.

Both of us being busy right now with the exams I asked her "If she would like to go bowling after exams". To which she agreed.
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Update: I told her about my feelings a month before going to the bowling. She rejected me in a polite way and we remained friends. I doubt anything will happen as long as she's together with her boyfriend. Thus I'll try to find my SO elsewhere.
Should I confess my feelings towards my female friend who probably still has a boyfriend? What do you think?
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