well I magine him and Alexa were sentimental, but not the way he would be everytime he is in love... I think it would depend on who he was when has in love as he is so much of a method actor that he takes over each personality.

I can see him having a casual relationship with Fitz, Rebecca or even with Ramirez who he is likely the only one to remember the real name.... sort of like friends with some benefits... but not totally trusted that no never...

not even with Byron and I am sure that he and Doc were at one time an item before Methos decided that he needed out.