We won't find healthy people who can help make a healthy relationship if we're not hanging out in healthy places.
My best suggestion is to find hobbies, causes, volunteering opportunities which match your interests. Spend lots of time just enjoying them and attending any related social events you can. Be yourself, and trust that there will be other like-minded people around you to form friendships.
The best way to meet someone deserving of you is to know yourself, be yourself, and enjoy yourself. Increase your contact with people, and widen your social circles wherever it seems to be a good fit for you.
One of the worst parts of PTSD is the constriction of our lives. We shrink the events we attend, the places we'll go, the social opportunities we could participate in. Many of us end up severely agoraphobic and have so little real contact with other people that our suffering is compounded with loneliness.
What activities outside of the home do you like?