Sometimes it happens that we're so busy focusing on other things that it takes some time for the emotions to catch up to us. It's okay to let it out! Hope you are holding up okay otherwise.
As for the email from the friend - that wording is a little weird but don't take it to mean anything too much, I've found that people in our age group don't really know what to say in this situation because they've never really seen it happen before. If you were already close to that person, I would say you could respond with a simple, "Nice to hear from you, I appreciate your concern." If you're up to it, maybe you could meet her for coffee since she reached out and offered to help if you needed anything. I found that starting to talk to people (briefly) was like a burden lifted off of my shoulders. Also, if necessary, you could clarify that it wasn't necessarily a mutual decision but you are accepting it and making the best and working on yourself and (since she's H's friend's fiancee) show her that you're still an awesome person and just maybe that news will get back to H without any effort on your part. But that will be a judgment call on whether you go that route.
