I have been in a respectful long-distance relationship for 3 years. After praying for guidance, we briefly separated but later reunited. I haven't shared my picture yet. Should I trust this relationship or seek more clarity on it?
Bismihi ta'āla
I do not know your circumstances, and you might both have a valid reason as to why you have not got married yet, but I do not really understand what "respectful long-distance relationship" is. Does it mean you are married, or in a temporary contract, or neither?
Decide to either commit to each other by getting married and being husband and wife, or make your final decision. It is unfair to be in limbo state like this.
If after 3 years, you still do no know if you can share a picture or not, what have you both been doing? Only you can make the evaluation and judgment of how far to take this, and whether you should share your personal images, or not.
Please remember the purpose of relationships, especially from what our religion Islam says.
And Allah knows best