My best friend is pregnant - why am I sad?!

So mine and my partners best friends told us they’re pregnant. We’re thrilled for them! Although I feel so sad because i would love a family, although I know it isn’t really the right ‘time’ in studying still. And my partner wants to move back towards his home town before we do. He says we have no support here (my parents live close by but are pretty busy, although I know they’d help out if we had a baby) but he doesn’t see that.

How do I cope with these feelings? They feel so overwhelming!