How do I stop feeling uncomfortable when talking to my parents or sister about relationships?

Dear Sam,

Thank you so much for reaching out with your concern.  There is very limited information, but I will try my best to help you give you options and probably solutions to your problems.

Firsthand, there seems to be an underlying fear of telling your parents that you are in a committed relationship.  There may be several reasons for this. Are you afraid that your relationship is not stable and don't want to disappoint your parents if the relationship ends up breaking up in the near future?  Do you fear your parents reactions and the way they will accept your partner? Whatever the reason, there is a fear behind your decision in not disclosing this very intimate part of your life.

It might be good to find a good friend who knows you and your family well to help you understand why you are withholding this from your parents.  Maybe someone close to you who knows your family dynamic can help you gain more insight. 

Secondly, since you disclosed that you have an issue disclosing personal things with your parents, it might be good to find a licensed therapist that can help you overcome your feel of speaking up and speaking your truth.  There maybe a fear of rejection from your parents for the decisions you are making for yourself or perhaps you do not want to face criticism; whatever the reason, it may be good for you to entrust a licensed professional like a Marriage and Family Therapist who understands family dynamics and is educated in family modalities in addressing these type of family related concerns.

Lastly, I'm curious to know how your parents responded when you said that your boyfriend was only a "friend."  There is something that is inhibiting you from voicing what is personally happening in your life and when you're triggered response is crying, there seems to be a fear behind voicing the truth of your relationship.  It may not be a bad thing to hold back, especially if you are in fear of feeling rejected or criticized by your choices from your parents.  

I hope my suggestions and feedback have helped you gain a different perspective on your situation and I wish you nothing but the best in your future.  I hope you are able to come to a resolution to this and understanding behind this.