Salaam alaykum,
I think you can also fall in love with how a person behaves, treats his/her family and friends, the character, etc etc. it's not just looks as someone else already said.

in order to find a person like that, with a loveable character, you have to ask around. your parents etc. your intention should be to get married.

indeed friendships between men and women are haraam, for a reason. there will always be a moment of weakness, from one of the parties involved...