As long as you are happy with who you are as a person and are comfortable in your skin then you will be attractive to people regardless of what you look like. As others have said, there is no law or rules to attraction. There is no rule saying that if you are over a certain weight you will never be loved.
I used to think like you, that because of my weight I would always be alone, but with the help of a friend, I became comfortable in my own skin and I have found love with a man who loves my curves and does not see my weight as an issue. He loves me for me and doesnt see what I used to in the mirror. He thinks I'm beautiful and so I am.