Need to vent

Sorry about this post but I need to vent. I have two best mates. The three of us do everything together! Both of them are pregnant, one is 25 weeks the other is 15 weeks. They both know I’ve been ttc for over 6 months now. They are both supportive and encouraging and I love them to pieces. Sometimes though being around them is so hard. They are both so excited about their pregnancies, as they should be, and I’m very happy for them. It does make me feel terrible about my situation though. I obviously can’t talk about how I’m feeling with them because I don’t want them to feel like they have to hide their excitement. I know it seems silly but I just don’t know how to handle the guilt of being upset and they way I feel so negatively about myself and my body for failing for so long.