Fear of Manifesting

Does anyone else have this irrational fear that the things you manifest may not be meant for you and that you are meant for greater things that you have unconsciously stopped those things from happening by manifesting things that may not be for you?
I have been manifesting things successfully the past year and it has made me want to manifest for my greater goals but I have this fear that the things I manifest are sometimes not meant for me and that at the end of the road what life has to offer is different things for me which may be better/different than what I manifest. This thought has made me scared to manifest, like maybe I do not know what is best for me. For example I saw a post yesterday where some people manifest a partner by writing things down in a paper and burning it, so I tried it but I thought about how maybe I am meant to meet my partner at a later part of my life and maybe I am only setting myself up for a heartbreak and so I have not yet burned the paper. Anyways what do you guys think about this?