I (28F) used to be best friends with my cousin (27M). I had known him when we were kids but we lost contact when I was like 10 when my family moved back to our hometown, until we met again as adults when I was moving back to the city we used to live in before. We're neighbors now and I recommended him to my company a few years ago, so we're coworkers as well. We used to spend all of our free time together, he was there through my grief after losing my father, I was there for him when he went through some stuff too. But last year he got a girlfriend and immediately it was like we weren't friends anymore. I understand that obviously it wasn't gonna be like that forever, us spending all our free time together, but when I say it was like I stopped existing to him overnight I seriously mean it. We live a block away but I can count in one hand the times I've seen him this past year, he ignores my texts and whenever we did make plans he'd ghost me and then ignore me if I asked him what happened, until I'd end up saying it's fine and to just forget anything happened.

I'm very strict when it comes to labels for interpersonal relationships, I'm autistic and he knows this. I don't have acquaintances, I don't have casual friends or distant friends, or yk people I'm just "friendly" with. I have family, coworkers, friends and family who are also friends, I have no relationship with my neighbors. I've asked him if we're no longer friends and he keeps telling me "you're my cousin I don't know how to explain it" but I'm not cool with that. Like yeah we are, but if we're just that and not friends then it's a different relationship than being cousins and friends to me. He's treating me like he wants someone who can be there on standby if he needs company when all his main friends are busy, and I'm not ok with that. I have no interest in being someone's last on the list if that makes sense, I don't care if that's not considered "normal", it's my social energy and I don't want to invest it in people who take me for granted or see my friendship as something super casual. So I told him I was done, that I'd always care about him but I need to think of my own mental peace and to only talk to me about work. I blocked him on social media and deleted his number from my contacts, just like with my other coworkers I only have him in our work chat and if I need to contact him directly his number is there so I don't need it saved. Well he did that for a while but then would start talking to me as if nothing happened, which honestly makes me uncomfortable because he's crossing the boundary I set.

Now about the loan. I had asked about this program at work and my supervisor told me he was looking into it too and to ask him so we could go apply together, I asked him about the process and all of that but then decided I won't apply for this loan because doing the numbers I can get there on my own in a year. He is applying and he needs someone to serve as "guarantee"(? Idk if that's the word, English isn't my first language and when I look it up that's what comes up, but the word in Spanish is "aval" so like someone he can list on the loan that would be responsible if he doesn't pay it). I qualify for that and I'm 100% sure he will pay it back, he's very responsible with money and I have no doubt in my mind that there won't be any issues. So when he told me he needed that I offered to do it if he didn't find someone else willing to. I did this because I'd do it for any other family member, even if we're not friends too, and I made this clear to him.

I'm in the process of collecting all the documents I need for this, I had to request a new copy of my ID card cause I had lost it last year, and he took me to do it cause tbh I don't need my ID for anything right now so it's literally just for him. When we went he kept talking to me like we were friends, like not just yk being nice to be nice, but asking me about my life and telling me about his. So after that day I asked him if we could talk as a last attempt at fixing our friendship. We eventually did but he had to leave early so we said we'd finish the conversation the next day. Next day comes and he ghosts me again. At this point I'm completely done with this bs, so I told him that I got the hint that he doesn't care and asked if he still needed my help cause my ID card is ready for pickup but I'll only go if he takes me cause, again, I don't need it and tbh I just don't feel like paying for transportation to pick up something I don't need for myself. So he said we can go on Monday before work, didn't say anything about our unfinished conversation.

Up until this point I was completely fine doing this for him even if we're not friends at all, but now I can't help but feel like he's using me and that's the reason he keeps talking to me like nothing happened. Like he just wants to keep me hooked until his loan is approved to then go back to being strangers. Which again I was fine doing this without there being a friendship, but him acting this way like there could be a friendship and then going back to not and back to yes... That feels insulting to me. So I've been thinking since last night if I should even do it at this point. Because if he thinks he's tricking me that's fucked up. Idk.

Any advice?