There are those that pretend to be on your side, but when the situation changes, their attitude changes as well. It's not always something they make a big scene with before going. They just distance themselves from you, more like a gradual withdrawal. As if the distancing was expected all along.
I have a scar on my left knee from a bike accident when I was 9. It is a story I tell those who ask me about my physical pain. Sometimes they notice that I stumble a bit especially on heels. My physical pain can be shown, it has a location I can point to and say this is where I'm feeling the pain. A betrayal from someone I have invited close does not.
This is a harsh truth, not everyone who requests to accompany you on your journey is going to be there at your arrival. There are some who are content sitting in the driver's seat and merely watching you drive. But the most dangerous ones are those who desire to get hold of the steering wheel. If they don't get to get hold the steering wheel, they will intentionally start loosening the bolts of your car.
A partner in a group can sabotage the whole group just because we didn't allow him to be the leader. This has happened more than once in my life.
Sometimes, not always, it is done out of spite. The fear of losing you is disguised as loyalty. Lack of trust is sometimes disguised as worry. It is something you may not realize until after you have moved on.
Your survival is heavily dependent on selecting the right people for you to associate with. The wrong associations will not just divert you from your journey but will reconfigure your journey entirely. Be careful who you allow into your life. Not everyone who enters your life is going to help you progress, some of them are preparing for your arrest.