Need Advice

My Bestfriend tried to commit suicide this past Monday and we went to a wedding this past Sunday... She was overwhelmed with everything happening in her life that she decided to try and end her life I asked her why she never told me being that I didn't notice the signs and she told me that she didn't want to worry me & I feel like I am not a good friend because I made her feel like she couldn't talk to me.... How do I get over that ? Like I honestly had a nightmare thinking what if I didn't find her in time 😪😢