To love with expectation means you are creating an image, an ideal, in your mind that you want the other to fulfil.
Problem is that no-body will fulfil that image.
Also love is a process of sacrifice and acceptance. In the dance of love there will be moves you want to make but the other doesn’t. If you try and force those moves (try to squeeze the other into the shape of the image you have created with your expectation) there will be discord.
The other will fill shame at not being able to meet the desires of the he/she loves.
So many relationships start with subconscious expectations and in end resentment and shame!