Oh, that's different then. I would be careful going forward if a relationship is not reciprocated, mutual or emotionally fulfilling.

As with your friend who let you down, I believe the minimum expectation in personal relationships is to be emotionally met. This would help the longevity and 'health' of the relationship. If he is already showing his true colours (he will not change) that you are only of peripheral importance to his life, I see this as a major red flag.