My brother is 20 M and I'm 22 M.

My parents had one rule: if you go to university/pursue some kind of trades program or make an effort to work towards establishing any sort of stable career.... you can live rent-free in their home. Otherwise, you pay rent.

I lived at home until I was 20 and then moved out when I could afford an apartment so it's just my brother living at home now. My parents are very reasonable and kind, they are more than willing to help us but my brother is abusing the privilege.

My brother initially pursued a college education and was holding down a part-time job, but he dropped out and now does only the bare minimum shifts at this job. He acts out at home with my parents.

Alongside that, he's become a very bitter person and I'm not sure why because I don't have any knowledge of his social circle to sus out if something happened between him and his friends?

He consumes a lot of R rated comics online and I think it is becoming a problem because apparently he used our mom's credit card and it sparked an argument. He had racked up almost $300 in one month. He won't tell me what kind of content it is but I have a vague idea. Outside of this 'hobby' I don't know anything about his interests, goals, or dreams anymore. He's a little grandiose sometimes (recent one is a tech start up he has a '10k grant' for that he won't elaborate further on). He's very secretive but will drop us vague statements like 'I have a locked document on my computer that's over 1000 pages where I write my innermost thoughts'.

I expressed my concerns to my boyfriend. We speculated maybe he needs a male mentor. Here's where I need to admit that although I'm a guy, I'm into fashion and the soft life, I just know I'm not the kind of guy my brother would connect with. But I knew he would connect with my boyfriend.

I asked my boyfriend to spend time with him and my boyfriend agreed.

My boyfriend made the following attempts: trying to get my brother to go to the gym with him (he gave up after a few weeks), trying to get my brother to do boxing with him (he declined), volunteering at an animal hospital that my boyfriend works at (this one has stuck).

Unfortunately, now he's starting to be come hostile toward my boyfriend.

It started when a female tech at the animal hospital told my boyfriend my brother makes her feel uncomfortable because of the way he is always staring at her. My boyfriend said he talked to my brother calmly about it without being too hard on him.

After this, my brother refuses to open up to my boyfriend or even talk to him.

While he doesn't give my boyfriend attitude out of fear, he has started to take his anger out on me, including relating my relationship to some web comic online, which I googled and it's definitely a derogatory comparison.

I told my parents I give up helping him.

They have asked him to move out.

AITAH?

How do you help someone who has become this impenetrable wall of malice????

He constantly has this edge to him like something is bubbling under the surface.

His recent demeanor and facial expression has become unsettling.

I have no idea how to 'reach' him.

I feel guilty for supporting him leaving my parents' house.

Will it push him over the edge?

It feels like his social skills are degrading the older he gets, instead of improving.

I don't get it.

I don't know how to help.