Engaged and sister mad

So I recently got engaged and I can’t even enjoy it. My sister is getting mad and saying “everything is about you”, “I can’t even get engaged or even a guy to talk to me”, “I’m done with life”. I told her I’m sorry and I don’t know what to do so she wouldn’t be so mad at me for this. She’s blaming me for everything. This been going on for more then a month. I’m getting married next year. I don’t think I can deal with it for a whole year Bc that’s when I’m gonna move out.