Growth
Change is uncomfortable and inevitable but often turns out to be positive. Like all living things on Earth we go through stages in life to grow and mature. Its important to try and start recognizing when you are changing, by noticing when things start making you uncomfortable in life. We are creatures of habit and because of this we often tend to stay in a bad or toxic situation because it is familiar, and it seems easier than the alternative options of starting over or taking a leap of faith towards something new. We stress ourselves out trying to tolerate things that we, in fact, do not have to tolerate at all and make excuses to ourselves about why we continue to do it.
If this sounds like you, don't worry, you are normal. It one of our natural survival instinct to avoid situations that could be potentially ‘dangerous’ however it only seems that way because the future is unknown. We are scared that a bad decision could land us in a worse situation than we are already in and so we justify to ourselves that what we are currently tolerating “isn't that bad” and “could always be worse”. That justification to ourselves is why we stay uncomfortably-comfortable in toxic situations and settle for misery out of fear.
The first step to overcoming this fear is to recognize the need for change. Identify where the stress is coming from, figure out what needs to change about it. What or who is in your way? Life is incredibly short and unpredictable, don't waste it tolerating things that you could've avoided by having a little faith in yourself and leaping for your chance to be happy. Happiness has to be generated from within you, it won't just come to you and you can't magically learn it. You can meditate and find your inner peace all you want to try to tolerate the life you are resting in but it won't change the fact that its toxic. It drains you as a person to consistently fight off bad energy and put up with things that are unhealthy. It is intentionally crippling your ability to focus on being happy if you do nothing to change the situation you are in. If you place a piece of moldy fruit in a bowl of ripe fruit, the rotten one will spoil the others. Toxicity only spreads so remove whatever is toxic.
Quit the crappy job.
Ditch the abusive spouse.
Cut off the toxic family member.
Loose your procrastination and apply for that school.
Whatever you have to do...
Take the leap of faith for yourself, and justify it to no one. You owe no one an explanation for your pursuit of happiness.