I have a patent foolproof method for sorting out interest levels.
Arrange a meal / pictures / bowkling, what ever, and when you part for the evening, stand very close to him and hold eye contact. Then move your face very slowly close to his, as though you are going to kiss him. If he responds, kiss him, and see what happens from there. If it is apparent is is not going to kiss you on the lips, move to the side and gently kiss him on the cheek.
Dignity maintianed all round - messages of intent and lack / reciprocated interest sent and received all round, and most vitally important, dignity retained by both of you.
Try it - it works.