Hi Sahra,
Thanks for your comment. That sounds like a really difficult situation. Obviously you want to be a nice person and people admire that about you, but it seems even your friends will sometimes take advantage of you because of that. It's okay not to always try your hardest to be nice and available for others, especially when this means you're letting others not be nice towards yourself. There is definitely a balance to be struck.
This isn't necessarily how all friends act. Maybe they're not purposefully taking advantage of you and being unkind, but it could be worth having a conversation with them about how they make you feel. If they are your friends, they should be understanding and be willing to respect you in the future.
Take care Sahra,
Sam