How will I communicate with my bestfriend who was pregnant by my ex?

Tweet

My bestfriend and I has a wonderful relationship...before. We shared many happy memories. She treated me as her elder sister and even her family treated me as a member. For four years, friendship ran smoothly until such time she left our province and I on the otherhand, have had a relationship with a man whom I thought I will spend the rest of my lives. Unexpectedly, our relationship didn't go so well. Harmonious relationship lasted only for 10 months. Still young, he wanted to explore more and enjoy life but asking me to wait for him so we'll end up with each other still. I hated the idea. With unsettled relationship, I went in the city to find work and to find myself. There my bestfriend and I met again and our bonding continued. After a month, she went back to our province. After a week, she called me up telling me that my boyfriend was courting her. With my pride, I told her it's OK 'coz I'd broke-up with him already. Perhaps, she just waited me to say that 'coz before her 2nd week of stay there ends, my boyfriend informed me she has accepted him and they both hoped everything's just OK with me. I didn't know what I felt that time. I just decided to focus myself in my work. Till I learned my bestfriend was pregnant. My ex-bf didn't face the problem. He left her alone. My bestfriend left our province. Her family didn't know she's pregnant. Until now, I didn't communicate with her. I don't know what will I say. Please advise.