ANSWER:

You should be happy you were saved from such a proposal.

These are waswas from shaitan to depress and sadden you.

Allah is the provider. As long as you had rejected him for the sake of Allah, don’t look back or else you will lose your reward and you would feel depressed for losing him! He is engaged to another woman and he is not the last man on earth! 

Recently I got a proposal from a boy. He has good character, namazi & has a decent job. My family was very happy with proposal. But we came to know that they are involved in shirk. So had to reject the proposal. My relatives weren’t happy with this decision. Sometime later I developed feelings for him. I have never talked with him. He is engaged now. I shouldn’t feel like this. Please advice me