Relax a little maybe he had to go do something with his wife and family

j/k
First of I would be wary about someone using the L word in such a short time.. He used it to try and sucker you because he thinks you are desperate and that's what you want to hear.
It takes more than Im'ing and text messages with phone calls to fall in love with someone.
Now infatuation is another thing.. This is most likely what it is.
I would back way off.. STOP calling him and texting him and let him come to you at this point.
and if you two begin contact again I would insist on a face to face relationship from now on.. It is the only way you can have a real relationship