Your feelings are real and valid. Why should you have to justify it in any way?
For example, you're hurt that your friend is drifting apart from you and you try to feel better about yourself by thinking of the situations where you could have had it worse. You're only dealing with it in a way where you don't have to face it, and someday it is going to come back, because you can't hide from it.
To be angry when your husband cheats on you.
To be hurt when a stranger calls you fat.
To be disappointed in someone you relied on.
To feel weighed down by all the workload you have.
It sucks when someone tells you that you shouldn't feel a certain way, or if you should be grateful you're not in a worse condition. Isn't that the very essence of being human? To feel?
To love, to hurt, to cry, to be disappointed, to be messed up inside, to be confused, to laugh?
Doesn't that just make you human? One that is well and functional?
If you were to justify all your emotions, what would be the difference then? You wouldn't be able to tell happiness from sadness then. Everything would be numb and monotonous.
That's not life. Life is suppose to throw you down then build you up and you're suppose to feel every single bit of it because they are your feelings and you have the right to it.
By suppressing your feelings, you're not doing any justice to yourself. You want to get better? Feel it, embrace it. Allow yourself to build that compassion for yourself. Usually when you allow yourself to feel the pain and sadness, it will pass by faster than when you don't.
If you would like to comfort someone, you should never ever deny or justify their feelings. It may seem insignificant to you, but it means the world to that person.
Know that your feelings are real, valid and reasonable.