How to talk to family about me never wanting to go to funerals

Like I love my family and I have grieved the ones I’ve lost but I can no longer go to hospitals or funeral homes especially for open casket funerals I hate feeling exposed in my grief I’d prefer to stay in my bed for a day or in my house and letting my grief out that way like I’ve thought about it I just can’t go to any funerals I think it is from the childhood trauma of seeing people in their caskets but I don’t know how to effectively communicate this to my family who I feel would hate me for not showing up