Love???? or what

Girl: I love you ,Boy : I love you too....Welll is this the best way to betray someone......?...love .... I have seen so many couples those are in love but then i come to know that its a compromise b/w them to be lover!! hummm... lemme clear it more.... Situation like this:- girl was having affair in past with another one,so the boy.. now girl broke up with him and now she found a new one and boy (the new one) also know about the past relationship and he is happy and says "NOW she loves me"... I cannt figure out what does that "NOW" mean.... I mean even if they are happy with the current relationship then wat was that they were having before...? wasnt that love too...? Is there really the word "love" exist? or is this me who dont know the meaning of "love"...? is love a commitment to be with your loved one or is a word which we use when we are most attracted to a person....? and when someone says "NOW" then are they really in love....? because if there is something called love then there should not be "NOW"....? it should be "ALWAYS"..... I think we have done so much unfair with "love".... without knowing that it may ruin someone's life..... Isn't It true..... Dont you feel its your story....? if yes then understand the depth of the "love" and dont love someone ,infact let that someone to love you..... and when you are sure that you dont have to use that "NOW" word and this "love" is for "ALWAYS"..... fall in love.... LOVE YOU ALWAYS........