Now the worse thing is ;[?

the guy that i got pregnat with has a sister and shes like my bf i met him throu her she donno me nd him had nd i havent seen him at school ever since i told him i was pregnat ... now im worry cuz shes been there 4 me so many times nd now that me and her bro *** up she dont even answer my calls i really wanna talk 2 her nd let her know her brother dont want the baby and i do but i think she hates me ... im going to colombia tomorow not 4 ever but 4 a while should i go c her and explain or just 4get it bout him and her???????