Friend issues, I'm stuck.

[Asparagus and Lemons]

Hey People,
I'm just having a bit of a 'down' day today, I have them often.
I just lost another friend, due to me going too far with a joke. I was just playing around saying she's a nerd and she was calling me a nerd, and then she told me to 'f' off. Then her sister cracked the poos with me saying I have no respect for people & I'm immature and blah blah blah.. I said I didn't mean any harm and sorry if I offended her, but now they both are not talking to me.
I only have two friends. I see them both about once a month, and that is because I am always the one making the effort. They will never come over, I always have to go to them. It's starting to really get on my nerves, I don't know what I am doing wrong. I never really had any friends thru school because I was so shy. I'm better now, and I have an out going husband that has forced me to talk to everyone. But it seems when I open my mouth, everybody backs off! Im not rude, or mean, I hate gossippers and bullies, I had to deal with them all through primary school and high school. So I refuse to become one. I just dont understand why I cannot make any friends?!