Move out of New York. Actually, out of the whole New York area. Find a community where people know who you are and remember you once in a while. In NY people are so overwhelmed with their own personal issues that they have no time for people outside their own family.
I know many people who moved to NY to find shidduchim, but not so many who succeeded. In fact, one young person in my home town moved to NY but eventually moved back home in despair – to end up marrying someone from the next block, who’d been there all along :-). NY is too big – move somewhere human-sized.