I feel anxiety and reluctance when I have to have to stand for myself, or doing something that makes me appear as not nice. I have befriended many people, and realized several red flags. For example, any friend who takes drugs, no matter if they're "light" or "heavy" drugs is a red flag. I say that because I have had the misfortune of knowing people who took drugs. I also instantly red flag a person who has severe mental health disorders. I am not talking about mild depression, or moodiness, I am talking about paranoia, hallucinations, violence and volatile mood. These people always fuck you over.
I have just severed ties with someone who takes drugs, is a progressive (communist), bashed me for speaking my mind about MGTOW and for literally always talking to me with an attitude. Talking to me like he's morally superior to me because he is blue pilled, etc.
I was blunt and appeared rude. I just told him to never talk to me again, and I deleted him from all of my social media and blocked him.
I appeared so rude, and my heart was pounding (although I obviously didn't display my anxiety to him when I talked to him). It felt so anxiety-inducing to "stand up" for myself. He has done me nothing but talk to an attitude with me, ignore me, acts like I have to agree with everything he says and I always couldn't speak my mind with him.
I feel so defensive about who to talk to now. Instead of freely expressing who I am to others (MGTOW, other stuff) I will deliberately not give any info to anything that is controversial or sensitive.
How to be more assertive?