We've been friends for about 3 months, online, we live in different sides of the planet. He stated I am his favorite, and the only person he trusts on discord, but ofc, it's different and less intense for non-bpd people. I think it's pretty mutual most of the time, but this past week he's been distant and I never know what to do when this happens because I always think it's my fault, like he's bored of me and thinking of ghosting me... He's less active, he responds to my messages but does not talk so much, and when I say I'm there for him if he needs to vent he thanks me but doesn't really says anything.
Some context: he has depression, he has trouble being open about emotions.
What should I do to stop thinking he will leave? It's killing me. He has said to me many times he won't leave me, but my abandonment issues are really strong and I don't want to ask for reassurance again bc I'm afraid of bothering him and making him leave...