Promise You a Life Full of Love

So my cat has a really watery eye (left) and he's been messing with it all night. I've tried to see if there was something in it, (Hair, fuzz ball, anything) but I don't see anything. He keeps closing it and when he opens it it's like he's crying out of one eye... I'm going to try to take him in but I'm worried... he woke me up just messing with it. Does anyone have any recommendations?? ( I know it's 3 am and most people are sleeping lol) Promise You a Life Full of Love