「我想給你一個未來，但我不知道你可以等我多久 」的英文 ，急?

A promising future with me is certain;
what is uncertain is your patience waiting for it.

I want to give you a promising future ; however,I don't know how long you can wait for me.

I much promise to give you a certain future;
but I don't know how long you can keep waiting .

I want to promise you a future but I don't know how long you can wait.

I would like to give you a future,but it depends on how long it takes.