How people react to us may not be under our control. People may not like us and might find fault with us. So what is within our control, then? I think the vow to be kind is within our control.
For instance, I can vow to treat others as I would wish to be treated, so that I can feel that I have done my most sincere effort. Even if others don't reciprocate or even treat me unkindly, at least I can feel that I did my part and put my best effort into being open and sincere. The fact is, this already creates a kind of warmth within us so that we never really feel alone.
I believe that at the end of the day, we are always interfacing with our mental state. Two people walk into a room and may see completely different things. The way we see things is impacted by our mindset. Do we view the world with suspicion, with paranoia and fear, or do we see that the world has abundant gifts, and everyone (without exception) is gifted? In choosing the former option, we make ourselves miserable, by always feeling that we can be ousted by someone else for something we do or say wrongly. In choosing the latter, we make the decision to see ourselves as living in an abundant universe. All this requires is a less attached and more generous, trusting view.
We already have the deepest gift within us--a divine nature or Buddha nature--which is not subject to the fluctuations of impermanent phenomena. Knowing this, we have much more we can give to others. We are no longer desperately hoarding our treasures. In fact, we have a gift that can give and never be taken away from us because it is our deepest heart that is universal to all.