Best friend issues?

Ever since my best friend moved out with this older girl she’s been acting different. She barely talks to me, and when she calls me it’s just sooo awkward that I don’t know what to really talk about. The only thing we really talk about is my baby that’s due in august. Here’s what’s really strange, she has all these friends and tells me she wants to hang out with other people which is whatever right? But when I tell her I’m going to hang out with someone or if she sees me texting another friend on Snapchat she’ll get all offended and say shit like “I’m your only friend” or “those bitches are fake” 😂 sooo I was like ok. I put her in her place and was like so why can you have other friends and when I do it’s an issue? And she avoided the question by trying to start an argument with me about some random shit that has nothing to do with what I said. she’s kind of always been like this but it’s gotten more noticeable. She’s also tells me how she really wants a relationship and she literally hooks up with all of these guys, whether or not they’re in a relationship. So as a friend I’ll straight up tell her to stop, and that focusing on herself would be the best choice since she keeps getting heartbroken by guys who only want to use her but then she ignores me and just keeps doing it, which is whatever. It’s her life but I just give her advice. I don’t really know what’s going on but we were always super close. And now I just feel awkward talking to her, some of that comes from her making plans with me and then right after posting that she wants to make plans with other people and doesn’t keep the plans with me. 🙄 we both graduated high school so it’s not like I can just make new friends that easily and I’ve been really needing a female friend lately but she’s so caught up in drugs and sleeping around with guys and asking me to catfish them 24/7 that it’s hard to take the friendship serious.