my dad had an epileptic seizure and very unexpectedly passed away in the begging of June. my mom and him were married for 30 years and were deeply in love. but lately she has been constantly talking to this guy, who my dad used to work with, they text 24/7 and she always talks about him. I want my mom to be happy and I want her to move on eventually but I feel like this is way too soon. how can I talk to her about it? I am 15 and all of this has caused my other sister to stop talking to my mom.

edit: im happy for her and I absolutely think it is stupid for my other sister to stop talking to us. but her talking to this guy is hurting my feelings and I feel like she is trying to forget about my dad. I do understand that she is a grown women and that it is her choice