Does it mean something if a french guy says "bisous" to a girl?

While studying in France three years ago I met a French guy. We had a little romance together and very memorable moments. We keep in touch together during all these years and even went to a weekend trip to Budapest in September then I finally had a chance to go to Europe. He always says "bisous" by the end of our calls. Do many French guys say "bisous" to the girls they know for a long time and had something romantic? What do you think? If there are french guys, let me know your opinion on it!