If you read this; will you call it love or friendship? Can I consider those love signs?

We got introduced online since more than six years. We were friends then became best friends. He talks to me daily and for long hours. He advises me well and stands by me when I m sad or feeling down, I do the same. He gets concerned about me when I disappear and keeps on leaving many offline msgs and mails. Lately since about the beginning of this year, he has noticeable changed. He keeps addressing me "Hello lovely, Hello sweetheart, my dear ...etc" and then he is talking about wanting me to visit him and the vice versa. He wants to meet my family and everytime my mom passes next to me and he knows it, he keeps insisting that I must say hello to her. When I asked him whats the use? he said "I ll explain later and she is a nice lady as seems"!! He told me "You make me happy, you are the happiest part of my day" He is 27 and I am 30.

So is he falling in love with me or he is just treating me as his best friend? I m confused.

Any help?