Will I be able to open my heart again 🥺 ?

Yes, I would hope so.. you are young, that doesn't diminish what you went though, or the pain you felt.. but it does mean you have a lot of years ahead of you in which to try and find

Mine closed some 30 yrs ago and I am not expecting myself to ever have the nerve to open it again

It's up to you, but first, you have to want that.

You will be able to in time.