I think it was unkind of your sister to "threaten" you with telling your parents (and worrying them). You all are adults and should be able to work together to help one another or at least talk to one another respectfully.

Do you belong to any other groups outside your home or engage in other activities? I would make a list of possible places to meet eligible men in your area (take a continuing ed class at the community center or community college?) or do some volunteering outside the home if possible so you meet more people.