All, I can see that you're trying to help but my OP was more of a sharing OP than asking advice.
Unfortunately, you cannot make people want to date you, want to be with you or care about you. I have tried dating but haven't had any interest, so quietly have had to give that one up! 
One of the problems with saying "I'm lonely," is that immediately people give you suggestions as to how you can fill your time, which I tend to find the average 'lonely' person does not need. After all, you can always read, watch a film/TV series, take up a hobby, exercise, walk, clean the house, mow the lawn, shop.
Being lonely - being really lonely - is so much more than "I am bored." I've tried to explain some of it on this thread.
For example, last Friday I was on half term, and I met up with two friends, also teachers, who were also on half term. We met up in a restaurant for lunch then had a drink afterwards. I was with them from noon until maybe 3 o clock. It was a nice day. Except - they both then went home to spend the evening with their husbands and children. I however went home alone and stayed alone.
Being lonely does not equate to, I have no friends.