Honest answers please: Are overly nice/ sweet passive and cheerful people creepy?

That's what I am. Nice, very very very sweet, passive and pleasing people becasue I don't wanna upset them. I don't have a lot of friends. My best friends are even getting annoyed with me and stopped hanging out with me and hangs with my older sister more often.
My sister is nice but very honest, sincere, tells it like it is and isn't always nice all the time but she has a TON of friends. I dont understand. I know I asked this question a lot bit why ever so much I'm losing friends?