How can I tell my teacher i'm in love with them ? x?

I don't want any comments like: Don't tell them or it will all end badly, I know my teacher - I know she (yes we are both girls) wont tell anyone because I tell her everything that goes on in my life and she helps me through A LOT but I feel like I need to tell her this I just don't know how. Please comment below how I can tell her please also I don't want any thing to happen between us (well I do I just know it's not going to happen !) I just want her to know how I feel about her xxxxxxx