she just switched up on me

I've been talking to this girl for a few months now, we've known each other for a while now, however never met.
shes going through some things now, she all a sudden has just stopped talking to me. I want to just ignore the issue and just forget about her, but i also want to tell her how i feel.

Should i leave it, so should i tell her how her just stop talking to me is annoying n strange