Sometimes, it is necessary to let go; whether it be a thought, person or thing. It may have been holding you back in ways you were never aware of and can be challenging to do, especially if you have invested a great deal of your time in it.
Once again, dearest child, never fear! Releasing is perhaps the scariest part. Once it has been accomplished, the lightness of being and freedom will outweigh any regrets you have regarding wasted time. Remember, nothing is wasted if you choose to look at it as a learning experience. Just take a deep breath and go. ~ Creator