I live in a big city and constantly see couples holding hands or happy together. I do get sad and jealous or wistful.

I am at this weird point of not being able to imagine any man wanting to be with his lady. I look at these couples and can't understand how it's possible.

Yes, it's a bit of PTSD.

I believe I will see the bounty of the Lord in the land of the living.
Wait for the Lord with courage.
Be stouthearted, and wait for the Lord.