Hey SW. I need advice

Okay, my cousin and I haven't talked in like 2 years. She's currently living in the neighboring country. She stopped making an effort to start conversations online, and I did the same because I felt like I was a bother or something. I mostly talk to her little sister, even on call sometimes. Her daughter has come to visit me a number of times in the past few months, but nothing changed between my cousin and me. I didn't take it personally or whatever. I know people drift apart as they grow.

Now the issue is her boyfriend went to a country that's currently at war late last year. Now her sister just sent a text saying that her boyfriend died. Do I send my condolences or just maintain the silence?