PTSD is one situation which is rarely helped by stoically trying to go it alone or “toughing it out”. That just leaves you stuck in misery.
Seek out all of the sources of help which are available to you. Some people respond well to group therapy and sharing while others find individual counseling more helpful. Some people make significant progress utilizing both.
Some people have also been greatly helped by a service dog.
Whatever you do, don’t try to go it alone. Just keep working at it and don’t hesitate to ask for help and keep asking until you find something which enables you to make progress no matter how gradual. Don’t give up.