I live in a houseshare and there's this cute girl who lives on the floor below I really want to ask out. I think she's giving me the right signals, she always laughs at my unfunny jokes and is often the only one laughing, she always comes to sit or stand next to me when we're having a convo in our group in the house. She sometimes makes unnecessary physical contact like e.g hand on my shoulder when looking at my laptop when I was showing her something on laptop. She's interested right? I don't have much experience with women but I'm not scared or anything - I just don't know what to say?. I knock on her door and ask her what? I think we both have the same intentions and it's up to me to make a move- but what do I do? Someone please help?