three indications

if you are unsure that you're friend loves you, try this.
caring, attachment, trust. first, if he/she misses you, he/she passed the first test. second, if your friend cares for you, concerned, he/she passed the second test. and last, if he/she trusts you, like, she/he says her feelings, anger, dissapointment, and loneliness, he passed the third test. rest assured, he loves you. but if one of these is lacking, have doubts.