Slowly, the attraction will evolve into fondness and this is where the interesting part starts. They will start to notice the special 'aura' emitted by the other person and they will start paying attention towards each other.

After fondness, the bond mature into like, which many people confuse it as love, this is the part where they start seeing each other, or u can call them taking each other as collaborating partner ( an interesting phrase i learnt from someone else), a.k.a. girlfriend/boyfriend, when u want to see each other as frequent as possible, want to be in touch as frequent as possible, want him/her to put u in his/her top priority in whatever thing he/she is doing, practically, u want to own that person all to yourself.

The final stage would of course be love. This would be a challenge for everyone because not every couple can reach this stage. When u truly love someone, u will think of her/him, miss her/him, look at something from his/her point of view without u knowing it even when u are having fun with your friend, just like u breathe in fresh air each and every now and then in your life. When u do this, then i would believe that is love.

In my life, i've had experience all of it, well maybe except the final part of it. I may not be an expert but one day, i hope i'll be able to experience love, do u?