(disclaimer - I may later regret posting this and I may delete, it, so I'd appreciate it if its not quoted - thanks)
Since I can not see the original post, I cant comment on that, but my fiance recently decided that she wanted to be just friends and re-evaluate our relationship if/when I find full time employment again (due to me being unemployed and not being able to support her financially). Whether or not I'm actually an INFP is something I'll leave to the reader to decide, but I can comment on how its affected me (for reference sake - male - mid 30s).
My first reaction of course was to try to avoid breaking up, but with that failing, the next step was an instant plumet into depression which has been followed by mood swings between sadness (crying for hours), melancholy detachment (where I am at the moment - as CrystalViolet described it, Numb might also be a good description) , and anger with bitter cynicism (directed at third parties that I hold responsible in part ranging from those who I suspect may have encouraged her to break up with me to all of the obstructionsists preventing an economic recovery and the corporations that outsource jobs (if I were employed, this probably would never have happened)). When I am in agnry mode, I also become hyper critical of everything and sometimes I will verbally lash out and criticize/disect/pick apart any suggestion someone makes and often in a not so tactful way. I must be retaining at least some bit of rationality, because I do not blame the actual employers who have not hired me, because I recognize that a 2 year degree puts me at a severe disadvantage when there are many others out there with more education competing for the same jobs (even unskilled minimum wage jobs have people with bachelors and masters degrees applying for them on a regular basis where I live (we have 4 universities within 90 miles or less - when speaking to the manager for the last job I interviewd for, they had over 40 people that qualified for an interview and even more than that applied)).
I am unable to enjoy any forms of entertainment (even when I laugh it feels hollow and unsatisfying), I have next to no appetite and when I do eat, I often feel like I'm going to vomit. I feel like I've also lost my motiviation and its hard to focus on anythign productive for more than a couple minutes at a time - the only motivation I do have left comes from my angry moods. I feel a strong sense of despair, hopelessness and powerlessness. I've experienced depression (often related to relationships) in some form or another for various parts of my life (much of my late teens and early to mid 20s, then again in lesser ammounts in my early 30s) so the experience is not new to me, but I felt I had finally found someone who was right for me, and having that ripped away from me makes this feel even worse this time. Since economic factors contribute greatly to this situation, the results may be more skewed than a breakup where everythign else was fine, but I know based on past experiences, that depression is my primary reaction and if the relationship can not be salvaged, I expect it to take me years to get back to a semblance of normality.