Why I feel so sad after being happy for at least a moment?

the reason is because when you are around people your mind is distracted, but when you are left alone to your thoughts you tend to think about all the mistakes and things that bring you shame, the only thing you can do to get rid of it is get rid of what is causing you the shame and guilt, if its porn than do a reboot, if its something else than get rid of it.

 

It might be about your core beliefs, What is going through your mind when your mood swings quickly?

Here is an example:

I've had good time but everything will suck again (images of past swings and disappointments) -- ask yourself so what/ what does this mean - say about me?
-- I have always had this problem and I'll never get over it --
what does this mean - say about me?
--My life sucks.

Your core belief would be "my life sucks"
Anyone who believes their life sucks -- or any other things above -- would feel depressed

The problem is not you, but your thoughts!
Write them down
And provide your belief(s)/ thoughts with evidence both for and against (might be hard to find against but try!)

For example:

Belief/Thought: My life sucks

For:
-I have a pmo addiction
-I feel depressed all the time

Against:
-I have a family that cares about me
-I am working on my addiction and making some progress
-I achieved ... in the past
-I met with my friend ... and had really good time


At the end
Alternative thought(s): Although I have a pmo addiction and feel depressed, I have a family that cares about me and I really had good time with ...

You can find more/less evidence on both and create more alternative thoughts
Taking the positive facts into consideration will make you feel better

*Also once you spot them, you can replace negative mind images that flash quickly with more neutral and positive ones,
It really takes conscious effort

At the end, it's all about what we tell ourselves!
Hope it helps

 

It happens to me too, just remember the good times fondly, it makes you feel a bit better.

 

Wow this thread was something I could relate to, but this is a good explanation as to why I feel that way too.

 

This is the first time to see someone has the same issue I have,I am really stunned