When you visualize things you are no longer focused in reality but instead in your own world its people's "happy place". and thats why visualization promotes relaxation and stress reduction.
I think check with someone. Being in over your head means that you feel like you've blown things out of proportion or you're speculating but aren't sure about something. Asking someone else for their opinion and advice is really helpful.
Mike is feeling jealous of the time Sergio is spending with will.
Sergio’s interest have changed
Sergio and mike may no longer share the same values
Sergio has changed for the worse
Avoiding drug use in the first place would be learning about the negative effects drugs have on your mind and body. Avoid situations where peer pressure might be a main factor in you doing drugs. Some barriers that might come up while trying to avoid using drugs would be as previously mentioned, peer pressure situations. If you have an addictions, you might have trouble stopping due to withdrawal symptoms which can cause you to lose control of yourself. Rehab is a great option for people struggling with addiction because it's a drug-free environment.