You can't just fake it until you make it!

cloudiness and fogginess lingering for months maybe even years

You may have moved past your issues on the surface, but if they're not truly resolved, then they'll continue to have a negative impact on your life!
Many folks have been through some stuff that leave  lingering scars.... not yet healed... 

I figure environment is probably part of the cause of the lingering cloudiness and fogginess. You may need a change of scenery Try experiencing that  feeling of looking at Love that ended..... from a distance, instead of  experiencing the loss over and over in the same surroundings  this is  doing more harm than you think. 
Here is something I read sometime ago.
Now she's  come to look at love in a new way, now that she  knows she's not standing in it's light anymore. She  want to ask her  no-longer husband why didn't he  love her enough to stay committed to her. But he naturally does not want to talk about it, he wants a stillness at the end of it, and sometimes she  feels as if, it was never real, he never loved her. She's  not here-to stand in his year in plain sight, and not in-love's sight, she  feels an invisibility like a neutron in a cloud chamber buried in a mile-long accelerator, where what cannot be seen is inferred by what the visible does. After the alarm goes off, she  stroked his ego, she feels  like a backup singer who sangs along side  him, as if it is his flesh that's singing, in its full range, tenor of the higher vertebrae,baritone, bass, contra-bass. She want to say to him, now, What was it like, to love me-when you looked at me,what did you see? 

Hmmm! that was a bit deep, I guess.... 

she has grown used to a man hold her up and balancing her,
when he no longer does she falls into a  funk!

I decided to put together a  list of five of the most common insecurities found in women after a failed relationship. What is fascinating is that each of the most common insecurities deals mostly with appearance or implications of appearance on current and future relationships.

• Sexual Desirability – Women want to be sexually attractive and are so driven by this need they find themselves constantly measuring their own desirability against that of other  they view as competition.

• Weight – this is a huge issue for women. They want to be skinnier no matter how beautiful they are and are constantly seeking out the latest dieting or exercise techniques to stay on top of their game, or regain their game.

• Career – Insecurities within the workplace are common as women strive to climb the corporate ladder, competing with their male and female co-workers, they have slightly different view of their female bosses those are just bitches they hate..

• Intellectual Life – Women tend to be very concerned about their perceived understanding of intellects such as social philosophy, math, science, or physics. This can lead to being even more isolation... a woman who believes she is getting a late start  feels that everyone will always be ahead of her.  

• Friends – Women can sometimes be insecure when it comes to their friends. Often they judge themselves based on the income level or appearance of those they are closest to, some of these friends are married)... OK they just envy these friends. In new relationships, sometimes women can be insecure of what their new partner might think about their friends or whether they will be attracted to them. 

One day, after you heal,  this song will sound good to you again as you will feel it in your core.

John Legend - You & I Nobody In The World)