I 20f can’t find the time to break up with gf 20f, when do i do it?

My girlfriend is incredible and lovely but I have come to the conclusion I want to breakup. I don’t want to get into it I’m very upset still, but it boils down to my feeling lonely and that we have mismatching emotional levels or styles.

She has an important event on the 11th so it would be too late to do it anytime soon. Today I asked to meet and she told me she is busy because she has to work on the presentation today and then is going to call her friend later today.

I suppose Il have to wait until earliest may 12th to break up, as I’d like to do it in person because I suppose that is the right way to do it.

I still feel uneasy if I was to break up with her today bear I want her to have the best mindset for working on the presentation and I feel like I’d be an ass to do that today, and absolutely not tomorrow or anytime later as that’s close to her presentation.

I’ve wanted to do it previously but she was busy on the other days or I couldn’t do it because I still am so upset

Advice appreciated please