How long does it take to get over someone?

So I have a habit of not deleting old voicemails and text messages.  I don’t know why.  Well tonight my voicemail inbox was full so I was forced to delete the messages.  I didn’t want to just delete all of the messages incase there was something important.  So I started listening to each message.  Then I can across the old messages from the guy I dated last. 

I really liked this guy.  I am just going to call him M.  I met M at a party at a friend’s house.  He had charisma and confidence.  I don’t even remember what we talked about but I remember thinking he was easy to talk to.  I felt comfortable around him.  I left the party before he did.  The next day my friend told me he asked about me.    So I Facebook stalked him.  

I sent him a message on Facebook and we started emailing.  After about a week of emails M asked me out.  We went miniature golfing and to lunch.  It was a really fun first date.  At the end of the date I gave him a quick kiss on the lips.  I remember wondering how long I should wait to text him.  He beat me to it.  I got a sweet text from him before I even made it home.  We went on a second date a few days later. 

We dated for about 4 months.  Things were amazing in the beginning but then…….I don’t know something shifted.  He was getting busy with work and making less of an effort to see each other. 

We got in a fight and I ended it because he lied to me.  It was over something stupid.  Funny enough I saw the lie on my facebook timeline.  One of his friends had checked him in a place on their status update.  I didn’t even have to stalk. 

That was in the begging of August.   Stupid things will remind me of him and I get a little sad.  I have also had a few random dreams that he was in.  It hasn’t happen recently. 

So tonight when I came across the old messages I should have just deleted them without listening.  I should have but of course..... I didn’t.   I listened to each one.  Some were really sweet. I actually almost cried over one particularly sweet message that included him giving me a detailed account of where he was on this trip he took.  He described everything and then said he missed me and wished I were there.   

Crap!!!!  How long does it actually take to get over someone?