How come sometimes people who you are friends with just stop talking to you ,
without even giving you a reason
Relationships tend to evolve over time, It's best to just go with it and focus on things you like. Things tend to work out if given enough time. You can always invite them to hang out if you really want.
they have a problem, and might be crying out for help
Call and find out if there was something you said or did? If nothing then, they full fill there purpose and is time for you to move to new friends.
I didn't stop talking to you. I just been busy and sick.