What does this mean?

My boyfriend sent me a text today saying "hey toots, when's cl?" and I replied saying "I just got out, going home". I randomly sent an email saying "I love you!" He texted me saying "hey..that was a different num..hopefully this is the same mellisa! too bad i couldn't catch u online. i really miss u today..loue u." He spelled my name wrong and he never spells like this. What did he mean about the "different num" thing? Was it a typo....what was he trying to say? Then he texted me saying something about taking me on a date friday.