Why did this girl block me on Facebook?

[Aro]

yeah so i might seem a little strange,but all this started weeks ago and I'm thinking about asking questions on Yahoo! now...:
I had a crush on on of my ex-girlfriend's friend,so I tried adding her on facebook.(me and my ex where in a long distance relationship).Days and she still didn't answer the friend request...My crush didn't answer me on facebook and all,I thought it's because I'm a stranger,and one day I messaged her and payed her a compliment,this time she answered,and when I asked her about the reason she didn't answer,she said her facebook didn't show any messages from me...I knew she was lying cuz there was a "Seen" sign near my older messages.I wasn't sure if she was single so I asked my ex,(We're still friends)she said she is NOT single and she is Not interested in dating foreign guys.
A few days after that my crush blocks me on Facebook,for no reason,I was sure I did nothing wrong to make her block me,but she did...I ignored the situation bu last week,I emailed my ex and asked her if she knows what's up with my crush,she said "why?"
-(me)Cuz she blocked me on fb.
-(her)Oh i think she died
-(me) yeah right.
-(her)I think I'm dying too
--------------------------------------… I haven't got any messages since then....................................… for reading!
I see,thank u all!

[Kaz]

Don't know what to say ...maybe your ex warned her off you or she just isn't that nice or she like likes you but does have bf

[Bikash]

Your crush may not be interested in strange guy or she thought not to be close with her friend's ex boy. The reason may also be she do not like you.

[Daniel]

your Crush is Not Interested in You Its Best that you Just Move on

[Nouara]

Girls stick with girls, and I'm sure she doesn't want to betray her friends' trust. Also, if she were really interested she wouldn't of blocked you.