<human>: THROWAWAY ACCOUNT!

Hi. I've been in a loving relationship for over five years. I was going to get married to this girl soon.

She recently started massive shifts at work, almost 9-12 hours a day, 6 days a week. We live apart and we got the chance to spend a few weeks together, it was amazing. Even though she was coming back late in the evening, I looked forward to her returning. I did get annoyed at things she did, but we always hugged it out afterwards.

On the last day of our weeks together, she told me about our future, about our kids names and about plans. This was a sunday and on the Wednesday after she broke up with me for a number of reasons, she wanted someone more compatible, she didn't feel like I brought the best out of her and that she wasn't feeling fulfilled.

I have to mention that I think there is another guy, we live in a big city in Canada, so we can go places easily and get around well. This guy works with her all the time and has the same passions as her, I asked her about her feelings and she kept them from me to 'avoid hurting me'. I think if she spoke up, we really could've worked on us! They have been hanging out and she went around his house to talk business and he ended up express his feelings for her on the Sunday Night.

I think a chemical mixture of another guy, long work hours, little time seeing or speaking to me lead to a bad situation. We are speaking now, but I truly feel lost without her and she's honestly my only friend. Is there anything that can be done?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Girl breaks up with me extremely suddenly, she didn't cheat but developed emotions for another guy after seeing him at work for a month. We had the best week of our lives just a week ago.