Your friends have been there for the extent of your relationship: the fights, the makeups, and the bliss. However, your friends have realised that something just isn't right. Maybe you're not happy and it shows or maybe you're complaining about your partner more consistently or aggressively. When your friends start asking questions, it may signal that you're falling out of love with your partner.
While this may be hard to combat, it may be a really important indicator for you to realise something is up in your relationship. But tapping into your friend group about what has changed or what you may be missing could help you take steps to fix what's broken.