To be blunt, yes you're over-reacting. Look at what you've written here, 'I know that she hates me' , she blocked me on watsapp'. Now why on earth would you like to be around with a person who hates you ? Fine, you love her but are you ready to tolerate her so called insults and theatrics ? Any individual with tiny bit of SELF RESPECT knows when to call it a day. The question is, do you have self respect or are you a prisoner of your fantasies?
Earlier I thought that you were just being one way traffic but I agree with @ALPESH KAPADI on this that your Masi too is stringing you along. I mean if she dislikes you then why does she still engage you? But then she seems to be one of those who secretly enjoys this kind of attention that she gets from you.
The bottomline is 'Are you willing to be a puppy who runs after the owner cause it depends on the latter? Or you're a man with self respect to take a decision ? If I was in your place I'd be like 'She hates me ignores me.... to hell with her. I deserve better, she doesn't exist for me'. At best Hi or bye that too if she initiates else let her be, you're far more important.
BTW you were going to US, right? I hope its not cancelled cause of Trump. If you go to US, your mausi will become history for you, there are millions of bombshells there waiting for you.
SO CHEER UP BOY!