<human>: So my girlfriend broke with me at the end of February.  We had been together for 3.5 years, and we lived together for a majority of the time including abroad for more than a year.  We lived together until St. Patty's day.  One of the main motivators was that we had a mutual couple friend coming down from Canada to the US to visit us.  We kept it together and civil during their visit.  

Since St. Patty's day and her official move out, we have had only essential communication until last week when we briefly exchanged emails wishing each other well and giving brief updates about our lives.  Tonight, I got a FB message from her saying, "Hey, what up.  Come hang if you want."  I still love my ex, so I was happy to hear from her and receive the invite.  

When I got to her new house only four streets away, her roommate answered the door.  Her roommate broke up with her boyfriend who is also my good friend/neighbor a month before my ex broke up with me.  Her roommate was surprised, but got my ex to come to the door.  When she got to the door, she asked what I was doing there, and I said that I got a FB message saying to come over and hang. She was still surprised, and I took another look at the message and realized it was from another friend whose name is one letter off from my ex's.

Now, I don't know what I should feel, don't know what I should do.

Summarize the given text in a few sentences.
<bot>: Went to ex's house after receiving FB message saying to come hang; arrived and realized that the message was from someone else.