The statement "Shall we meet up for coffee" in and of itself is not sufficient to exclain you thoughts, or emotions.
"As a friend" would and/or could be used as a disclaimer/ rejection of (more than friends) as a reply
Start by saying "I think your attractive, I like your (views, sense of humor, etc) , Would you like to go out for possibly lunch or coffee? " "I would like the opportunity to get to know more about you"
_________________
"I feel as if I am walking in the rain, everyone else has an umbrella,
but I do not. I am soaked to the bone and shivering from the cold."