I'm sorry your family isn't understanding. And I didn't think you were overly negative. It is sad to feel alone. It must hurt to have someone pick a "jerk" over you, but their poor choice only says something bad about them - it doesn't say anything bad about you.
And I don't think its "macho" to take advantage of and/or hurt someone who is physically and/or mentally weaker. I think its macho to be supportive and empowering towards others. And I know there are other people who think so too, even if they seem to be in hiding right now. Stay true to your beliefs and values. The right person will hold the same ideals sacred. In the meantime I hope you can take some comfort from friends, and find as much enjoyment as you can on your own.