I think my colleague wants to make me jealous or he just wants to make me understand that there is nothing between us.

Once he called his girlfriend before me and he said, is that you love me will sweep everything in sight before me and he watches my reaction, he tells me about the girls who was in love with him and his conquests, he yesterday comes to me and said "she's beautiful" I asked who it said my colleague, later lunch time I'm sitting side by side, he calls his girlfriend told him I have called all morning , told him just to tell you I love you, I felt he did it on purpose so that I hear, I say that I am also his friend and confidante, we spend a lot of time every 2 , what do you think?