What`s Next?

Well, I was sure that she is in love with him, I thought not to disturb her anymore. So I just tried to be her friend and not to cross that "LOC of Friendship", if you know what I mean ! But then one day I told her that I love her. Oh ! She clearly said NO. Well at that time I tried to convince her, even though I knew that she was in a "relationship" with someone. She used to tell me about him, like "Abhi wo tuition gaya hai !", "Abhi wo call kiya tha !", "Aaj uska IIT ka exam hai !" and other stuffs, I was like.. "Accha Hai !". I never wanted to separate her with her "Dost", caste did !. She had told me that since he belongs to other caste , marriage is not possible. I was relaxed a bit. Still, I was not playing a game to win a title, I just had cleared my affection towards her (I find "feelings" absurd). She also used to tell that he used to become angry due to her late reply on each SMS (that time). I thought even I cant tolerate this, if anyone is giving you his or her time then Its most important gift, because they cannot get that back again. The day came, She texted me.. I LOVE YOU ! I was just....😦 But I said NO ! I thought it was a prank. But then she said that she has cleared her "account" with Prashant and now she is ready to be with me. I felt.. OK, thik hai !. Today I realise I should not have told her that I love her, It created chaos, for me, for her, for "him"(Dost).
I was not the right person, and the reason is that I expect too much, I thought we are no different, but there was! Let it be. It is not the part of it, its the dark side. What happened next?? Why there was a feeling of insecurity in me? Was there someone else?? Who? Next time.