Firstly, let’s define some terms.
DD/lg refers to the relationship dynamic between a DD (dominant, daddy) and a lg (little, girl). It does not go into the details of whether the relationship type is ageplay or actual regression.
Ageplay refers to the action of role playing another age other than one’s own (either younger or older).
Community terms, acronyms and info.
What you describe aligns more with age playing rather than DD/lg. Of course DD/lg interest could be present, but that interest could only be manifested through ageplay as long as any of both halves is not present. We are assuming that you did not have an actual DD to be able to carry out such relationship, but feel free to correct us in a reply.
We would say that ageplay is a very common and intrinsic aspect of childhood. Often children are encouraged by parents and adults to carry out activities with increased responsibility. The act of playing with dolls, caring for a toy, can also be limited forms of ageplay.
Now, if the reason for ageplay during childhood is given outside of fun and games (children also like to role play “house” settings), it can be an indicator that ageplay could be a form of coping mechanism, as we believe you describe. However, we would believe that in most of these cases feelings and thoughts are not well-developed yet, to the point of making conscious decisions that would reflect a lifestyle choice rather than a natural reaction to stress.
We would say that it only becomes a lifestyle once somebody becomes aware and makes decisions that take into account one’s aspect of ageplay and regression. For example, if you plan on making home renovation, and you seriously consider turning a room into a playroom, then that would be a clear indication that it is a lifestyle rather than just a basic, occasional activity.