People have the right to change their minds.

If she doesn't want you to see the post, she doesn't want you to know about it.

If they don't want to give you rides, stop asking them.

If they don't invite you to hang out, stop pushing the issue.

Just because they may have given you rides or said they were your friend once upon a time does not mean they are interested, now. A ride or a FB friending or a hangout or an exchange of "we are friends" is not a contract set in stone forever and ever to be your friend forever. I'm sorry. You have GOT to understand this. It will make life easier, and you'll feel hurt much less often. These girls are not interested in you.

Try looking for friends outside of this church group. Maybe Meetup.com has some groups you'd be interested in?