Disney2019, I am in the absolute same situation. I always do this, I have just now even posted a thread about chasing, so I relate so much to what you are saying.
You know, I thought also I need to change, but you know, you know deep inside what you need to do and if you do something that you don't feel comfortable with you will end up regretting it.
If you feel like you need to chase, you will chase until you no longer feel like you need to do it. Do not change yourself for someone.
And you know what is the positive of chasing is? Once you are gone, it will be very much noticeable and will give the person the "oh where is she" type of thinking. If that is your person, he will come back. If not, he never was. Hurts just to say it...