I bought a new bike for commuting to work. I have an older bike I got for free, worth ~150$, that me and my bf have been sharing.

I don't want my bf to use my new bike cause

• I bought a bike years ago that I let him use whenever, and I would ask him to always bring it in the house cause we lived in a bad neighborhood. He used to drink a lot at the time, he left it out after I'd fallen asleep and it was stolen. Still bothers me

• We don't have a car. This bike is flashier ($500), more likely to get stolen, and I wana use this bike to commute and save money and time not taking buses/ubers. I'd be pissed if it got stolen and had to drop another 500

• I haven't set up any anti theft/bike insurance/registration or anything like that yet besides locks.

• He has had his own bike stolen not locking it up last year

Before the bike shipped I said all the above to him. He seemed upset that I was still hung up on my bike years ago but said ok.

The bike got here, and he asks me if he can ride it somewhere cause it looks fun and I said no, he can keep using the other bike, and when we go out on rides together soon he can ride my new one then to see how it is

He asked me again today if he could use my new bike to go to the store. I got mad, told him I was mad that I already told him before I got the bike and he already asked and I said no but he keeps asking. He has stopped drinking for a few months, and said he would always lock it now, and if it was stolen when it was locked up, then it would get stolen even if I was riding it.

I said if my bike was stolen when I was riding it, at least I'd be pissed at myself and whoever stole my bike. I didn't wana have the situation where it happened to him and I'd be left wondering if he didn't lock it and be mad w him about it.

He said something about how I'm an only child and not used to sharing things and I said ok, stop asking me about my bike and walked away.

I guess he's seeing me as selfish and holding a grudge for the old bike. It'd be different if he was sober for longer, or if he had pitched in to get me another bike after my last one was stolen, but it felt like he never accepted responsibility for not being careful with my bike and blamed it on the thief. I just wana know this isn't gonna become a thing between us again. But now I'm kinda mad he isn't respecting my no too, AITA?

edit- forgot to mention, I'm keeping the free bike so he can use that one whenever he wants.