Is my best mate being a jerk?

Me and my best mate usually see each other at least once a week. Days out or nights out just her popping round mine. She lives with parents still. I haven't seen her for 5 weeks now baring in mind we live in same town 5min walk! And I've seen all over Facebook her going here and there with other people but she's been too busy to meet up. It's harder for me because I have a one year old to go on nights out etc but even then in last 5 weeks I haven't even been invited anywhere. I've made myself available and she's planned a few times then cancelled. I have big news pregnant with number two and I haven't seen her to tell her. Also partner was in a car crash she's not even checked how we are or anything. Don't know if I have a right to be annoyed or I'm being pathetic. Oh in last 5 weeks she's got herself a boyfriend...