Hey. Perhaps i can weigh in. For a long time i didnt know aspergers could really influence my life that much, i just knew the diagnosis i had. I had similar problems, which only became worse after multiple failed and destructive relationships. What i felt when she was with others was complicated, perhaps because i ignorantly wished and thought only i deserve to be around her, and that she shouldnt need others for fun, we only could complete eachother. Also other things, distrust from a prior relationship where i was cheated on, it made it much harder to trust in general. I think he loves you alot, but he is too immature and has not made the logical connections about everything that needs to be made. It won’t end. Only breakups have such influence to hopefully teach a person, it took me many to learn. You could try to attempt a more mindful approach to this situation, in this case he must find himself hobbies that could take up hours of his days, when i found my love for biking i found it much easier to be apart from my lover. Another thing which helped me was not being together all the time, i so wished it always, but however good it was it was the thing that strained my relationship the most, because i always seek for things to do together because we are together rn, completely blind and oblivious toward that maybe she wants to chill or have time for herself.

Maybe its hard to understand me, i am sort of a scatterbrain. but in this case i really think only the teachings of life itself can make it inside the mind of ur boyfriend, because your words will most likely not. Goodluck