Waiting in any capacity is annoying. Some waiting causes excitement like on Christmas Eve when you are waiting for the next day to open your presents. Or if you know something big is about to happen then you might be excited anticipating it. Some waiting causes anxiety. Like if your waiting for the cast list to be posted. Or for an acceptance letter. Or for the something new to happen in your life. We as people spend a lot of time waiting for things. Most of the things are small, like your food to arrive at a restaurant or for a new episode to come on the following week. But other things can cause you to lose sleep or lose your sanity (only briefly).
Waiting for things does not have to be a bad thing. It does not have to be looked at as negative all the time. This goes especially for when you are waiting for your life to begin. When we are young we in vision life. We see older people's lives or see fictional people on TV and plan ours according to what we liked or disliked about what we observed. I know I did. I had a plan that by this age I would be doing this and by that age I would have something different. But life looks at your plans and goes, "Aww that's cute. You tried to have control over your life." There are certain things in life you can't change or control, like the actions and feelings of other people, and those things influence what happens in your life. These things can delay your plans or even cause them to change. And then you are left waiting for the things you thought you would have by now to happen.
Maybe you thought you'd be in a relationship but that special person hasn't shown up yet. Maybe you thought you'd have a career but your opportunity hasn't presented itself yet. But just because you have to wait a little longer than others doesn't mean it's not going to happen at all. Waiting does not mean you aren't supposed to achieve your goals or that you are forced to stay exactly where you are. There can be a number of reasons why you don't have what you want yet. Maybe in your waiting, you aren't working towards it. Maybe you think it will just fall into your lap. That's not going to work. Or maybe you are not at a place in your life where you are ready for it. Maybe you need sometime to grow and mature so that when you get what you want you can handle it.
So sometimes waiting can be a good thing. It can prepare you and make you fully equipped to take on what you want, but you have to make sure that while you are waiting you do your part. Don't just sit on your couch and dream about a better life without doing anything about it. Sometimes being proactive can help to jump start the thing you've been waiting on to come into fruition. If you want to start dating, you can't stay in your house and wish up a boy/girlfriend. You have to go outside and meet people. You have to make yourself available and be open to new experiences.
If you want to live in a big house one day, you have to be serious about your career. The people with the big houses and fancy cars didn't wake up one day and have those things. Yes there are some people who are rich/famous for no reason at all (*coughs Kardashians*) but for most of the people who have nice things had to work really hard for those things. Plus hard work helps make you look at your accomplishments differently. You're more likely to value what you had to work for instead of the things you were handed.
So yeah, waiting it annoying and can be anxiety inducing but not all waiting is created equal. Some of it is good and will help you in the long run. So while you wait, focus on your goal and do everything in your power to help it to become your reality. That way your waiting will not have been in vain and when you get it you can appreciate it fully.