Communication becomes less frequent or stops altogether.
They no longer make spending time with you a priority and may cancel plans at the last minute.
They may not show as much affection or initiate physical contact as before.
It seems that they are less interested in your life and what is happening with you.
They become less responsive or engaged in conversation.
They start avoiding talking about the future or making plans together.
They no longer make an effort to surprise you or act thoughtfully.
They show interest in other people or activities outside of your relationship.
They get easily annoyed or irritated with you.