You had an "encounter" a sexual hook up and then you chatted once and a while on the computer. Your ex bf says no one will ever love you but just use you and then this fling guy comes back with "I know what he means, I still love you?" Did I get that right?
If I did then no he doesn't love you or even think anything more than "I could fck her again if the opportunity arose." Even If I didn't get it right, you had a fling and you chat once in a while. Loving actions (of which there are none) indicate if someone loves you.. not a few words exchanged with nothing to back them up.
I think the answer you gave him of "thank you" was probably the best way to handle words that have no action backing them up.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion