Back at the end of October I started a new job at a new company. Almost immediately I was attracted to this guy a bit older than me. It started off as a normal crush but after a few days of working with him I became obsessed. With him being straight I accepted the fact that a romantic relationship was completely off the table yet nonetheless I still remain in this involuntary obsession. He left the company a month after I started, I sent him a Facebook friend request and apart from becoming friends on Facebook we haven’t talked at all since. I’m still completely obsessed with him to this day and it’s been wrecking havoc on my life for months to the point where its hard to function because I’m thinking about him all the time. I’ve “obsessive crushes” a few times before but they never lasted more than a few weeks. I really don’t know what to do, how long do things like this last?