Having faith in Allah does not give you some form of immunity towards the problems and challenges of this life.
You can have faith in Allah and still feel sad, hurt, heartbroken and depressed. The thing about faith it is meant to restore hope within you and to remind you that there will be a better tomorrow, but as humans, Allah has created us with complex emotions and we were meant to feel them and yes, that includes feeling sad too.
The point of having faith is not to have problems or remain unfazed by them, it is to know that even in the depths of the darkness you are facing, you are never alone and Allah is always there with you. Your faith is not directly proportional to your emotions, feel them, validate them but know in your heart that better days will come, insyaAllah and you will get through this and there is light at the end of this tunnel, hold on a little more, and just a little more remains.
Salaah, du'a and the Quran are life vests to keep us afloat when we are drowning. It does not mean we won't be thrust in an ocean. It does not mean we won't sometimes feel like we can't breathe and like we are being dragged under.
But,
even when facing the highest wave, even if at times we are swallowing water and gasping for air, it is knowing we have some-One Who will bring us back and keepus afloat and help us get back to the safety of the land again.
And know that despite the negative ways others may make you feel, Allah is the One to Whom you can be vulnerable. Where we can shatter, where we can show every insecurity and know that we are still worthy.
The prophets (PBUH), has shown us that even when others do not understand, even though with your amount of worship, the struggles of life are incredibly overwhelming.
With Allah, you always have a safe place.
"Mental illness is a special trial, no bruises, no evidence. Just a silent battle that Allah has hidden from the world."
P / s: Hasbunallah Wa Ni'mal Wakeel