How do you get respect from others?

Since being ostracized I feel so depressed and also suffer from low self esteem (like I'm not enough). Now, I feel like I get disrespected from people. If I talk they barely reciprocate, if I text they only text back hours or days later. If I try to make plans they avoid or evade or give in (but don't seem excited) - these were all my friends before. I've always been social and bubbly, happy and loving to people. I've never had a problem with people treating me super disrespectfully or avoiding me. This is hurting me more than I can even explain in words. It's like the narcissist I've been dealing with for a year has turned everyone against me, and there's nothing I can do about it. I don't want to be paranoid, bit it seems like this all started with the narc. It's hard not to hate this person. It's hard not to have a deep raging hate for them that spills over into my life.
And the thing is... I'm not an angry person. I'm a "live and let live" kind of person. This person has soiled that.

So... my question is:
How do I get people to stop treating me like I'm some underling who they can treat with distain?

I'm not sure if this is it, but I have the same problem and I think it's because I'm such a 'people pleaser' there isn't much substance for people to hold onto. But at the same time, I withhold giving opinions on things for fear I'll be unpopular, but I've been unpopular for all my life, so...

ETA I really hope you'll be able to change the way you're perceived, and get.respect and love.

I'm sorry this has happened to you. How good were your friends to start with if they can be turned so quickly? You could make new friends or try to change the relationship with your old friends. If you decide to do that, stay positive and bubbly. Approach the 'weakest link'...the one person you think you'll get the furthest with and start rebuilding. Show them you're the same bubbly, loving person you always were. Once you're back in their good graces try to find out why everybody turned and address it from there. Good luck and I wish you the very best.