Best friend pregnant

So my best friend just told me yesterday that she is pregnant and I am so happy for her I’m excited for there to be a wee baby around. But then also my other best friend is moving to a different country to travel and I just feel like I’m going to be losing all my friends and be left behind as I don’t want or am not ready to have children at the minute. I’m just confused because I’m so happy but sad at the same time. Is this normal? I feel guilty for feeling sad and a bit sorry for myself.