I jumped up in the air while playing basketball and i heard a pop. i can bear weight on my knee but not bend it. i don't think i have any symptoms of a torn acl or anything like that?

Need investigation: You have symptoms " not bent it " Possible to have injury to meniscus , or collateral ligaments , see an orthopedic surgeon for examination and possible MRI

Straighten out.: The fact that you cannot bend your knee after hearing a pop, is something that you might want to have evaluated. and right soon. Torn tissue jamming the joint is a consideration. An orthopedic surgeon is your best bet.