당신 have to build it up: hang out with him/her with his/her 프렌즈 and your friends. This will not make the person uncomfortable. When your 다음 to the person, put your foot 다음 to his/hers 또는 당신 could put your shoulder 다음 to them. If they pull away, don't try it again. The big 질문 should be asked like this: 당신 should ask him/her face to face-with your and their 프렌즈 around. Say it casually, and give him/her a 일 to think it through.