Looking for a new job is not dissimilar to looking for a life partner. You only need one and it’s important that it should be the right one.
It can be very disheartening if you get as far as the job interview, give it your best shot, and still don’t get the job. But try looking at it from a different perspective. Employers understand about their team and the job on offer. If they think you are not the best person for the job then give them the benefit of the doubt. Take the attitude that they are probably right and you wouldn’t have enjoyed the job anyway.
If there is only have one vacancy then the employers have to choose. If were to offer you both an apple and an orange and ask you to choose one, it wouldn’t mean that you despised the one you had not chosen. So don’t feel rejected, put it all down to experience.
It may take a very long time to find just the right job, but be confident that it will come along, although it may take some time. Every time you go for a job interview you are adding to your interview skills. Keep on believing that the perfect job for you is just around the corner.