Men that turn you down are looking for a life long commitement.

Having 2 children at that young age without a husband/father raises an alarm and a red flag that you are not responsible. And unresponsible people don't tend to make long lasting working committements.

Essentially you have luck with men that don't want a committement, but just sex. It's not that hard to understand.

If what I have said is not true, you would already be married to a man "out of your race", instead you are crying on an internet forum.