I Been in a relationship for 3 years .. January 31st is the day my sister died in 2007. On that day if this year me and my boyfriend got into a fight .. Well since than he won't talk to me, reads my messages and don't respond  .. I need advice .. I been fighting for this relationship for years now.. It's so hard .. What am I supposed to do? I don't wanna give up on someone I love that means a lot to me ..