Oh yes!
I sometimes wish I could lay in bed or curl up in a corner and not leave the house. Not an option when you have children though.
I have agoraphobia and claustrophobia and some days I nearly pass out just taking a step outside my front door but I carry on, somehow. I don't know how I think it's just that I keep saying positive things in my mind usually something like," don't panic your ok, your just afraid". I think this must help.
We all have this problem I don't think it's just you. PTSD is extremely complicated and symptoms differ person to person.
As to friends, I also don't have many. I don't make friends easily, I think this is because I'm very black and white and will say it how it is. I like to compare myself to marmite, you either love me or hate me.
Some people just get sick of asking me to go out and I can't because of the agoraphobia, they just don't understand it. But that's ok with me I don't hold that against them.
I spoke to my counsellor about this in my last session, as I'm always tired, have little or no energy and never feel like I've really slept. He explained it really well to me to make me understand, he said that a PTSD brain doesn't work like someone without PTSD, hyper vigilance, nightmares, panic, flashbacks emotionally and physically wear a person out. He said it's like running all day and not expecting to be tired after. Now that's how I look at it, I don't worry that I'm tired anymore as now I know why.