<human>: Can you provide a brief overview of the text?

Throwaway for obvious reasons.

We've been together for about 3 months now. He's currently living with his mother who is a raging alcoholic. This translates into one of the dirtiest houses I have ever seen. The one night I did regretfully stay over, I could feel fleas crawling all over me. I noped out of there real fast and vowed to never stay over again.

He informed me tonight that his adorable cat (it really is a sweet cat!) has worms. Problems with this:

1. I have SEVERE scoleciphobia (phobia of worms). I know it sounds silly, but if they pop up in unexpected places I completely flip my shit and break down. If they're in the grass, that's cool. If they're somewhere that isn't the grass, I'm usually having a panic attack and/or crying.

2. As stated, he's not the cleanest person. He told me he picked up some deworming medication tonight but from my understanding of transmission of these buggers (if it's tapeworm, at least), the fleas are carrying the worms, meaning that unless the fleas are gone, ms. kitty is going to continue to get infected. I wonder if his dogs have worms too.

3. He wasn't feeling well the other day. 

Right now, I don't even want to see him and I'm completely repulsed by the idea of being anywhere near him just knowing there's a chance I could pick up some kind of gnarly worm infestation from him. Worse off, what if he brings the worm-ridden fleas into my apartment!? 

At the same time, this is really difficult. I care deeply for him and I know he feels the same way. I don't want to handle this in an insensitive manner and compromise our relationship.
<bot>: My boyfriend's cat has worms. I have a crippling phobia of anything worm-related. I'm terrified I am going to get worms from him. How can I express my concerns without being offensive or sounding crazy?