Exactly, and it's because people make stupid decisions like your one that the virus spreads. Of course your own decision is ultimately almost statistically irrelevant, but there's many many reasons why it's a terrible idea
There's a lot of stupid people in the world, making silly decisions - I've made a few of my own and would have done things differently had we been given better information earlier - but the only way we stop it spreading is by, collectively, doing the right things to avoid it spreading.
I have tremendous sympathy for what must seem an incredibly daunting period of loneliness, my housemate is immunocompromised and has the exact same thing ahead of him, but it doesn't give you carte blanche to avoid criticism for making decisions that are directly or indirectly going to put people at risk, increase strain on the NHS and get people killed because other people are doing it too.
I withold more criticism for the government for not taking the decision to close everything down themselves, but it's still within our own collective purview to follow the advice we've been given to slow the spread of it. Proudly flouting that you've ignored it, with an almost impressive lack of knowledge about how the virus spreads or is transmitted, is, obviously, going to rile people up.