Can you validate this feeling a little bit for yourself? It might be scary to have a new experience of feeling cared for and safe in an intimate relationship. Not everyone is trustworthy in that kind of relationship, and I also feel that until you have tested (in an appropriate way) many of the points where you may have been disappointed in the past-- in the way most people might have experienced-- it doesn't feel safe to totally let go. Does this make sense? I felt really guilty starting therapy and being "on guard." Sometimes it relieves some of that burden to just know it is part of the process.

Take care!