I would do some research first on caring for a pet. Cats are relatively low maintenance, but there is still a responsibility there. I’ve lived with cats all my life, and currently I live with three indoor cats and one indoor dog.
For expenses, there’s food (higher quality for a healthier/prettier kitty and a less smelly litter box), litter, litter box, toys, and vet visits (at least once a year for shots, can run up to and a little over $100, depending on where you are and how old the cat is).
For responsibility, you should clean the litter box at least once a day, and while you can free feed, that can make your cat fat if they gorge themselves (which leads to other unhealthy qualities for your kitty). While I’ve left my cat overnight by herself, I wouldn’t leave her for more than one day – you’d need to get someone to check on her or leave her with someone if you’re gone for more than a day or so.
For allergies, I found out I was allergic to dogs before I got one – I would break out in bumps on my skin where they touched me, runny nose, all that fun stuff. I saw an allergist once and got on nose sprays, and I take Claritin or some other allergy pill once a day. My allergies still exist, but are much better and I can easily deal with them. I could go the shot route, and maybe will one day, but for now I’m ok dealing with it.
Cats can also have irritating qualities that you might not want to deal with. When my cat Ginger was the only cat in the house,she’d wake me up at 0500AM every morning on the dot, whether it was a work day or weekday. She paws at the blinds, makes noise, and it can be really irritating when I’m trying to sleep. She also sometimes pottied in the bathtub, so I had to learn to keep the door to the bathroom closed. Cats are, by nature, more active at dusk & dawn, so sometimes they can develop patterns where they are active when you are decidedly not.
It all comes down to if the benefits of owning this pet are worth the possible negatives. To me, I always want a pet in my home, and the fun and loving times I get with them are well worth the irritations, responsibility, and expense I put into them. I love how Ginger greets me when I’m around, how she jumps up on my nightstand when I lay down for bed to be petted. My fiance has two cats, and Cesar always parks himself on his chest when he’s going to bed for a 5-10 minutes for attention time. I love making them chase the laser pointer and how loud Ginger can purr when I pet her. Roscoe (the dog) lays down at my feet during the workday and lets me know when someone comes up the driveway. They make me happy and I feel I make them happy.
I think owning a cat may help with your loneliness, but you should do some research and think about it. A picky cat may not work with you (at first, at the very least she’ll be freaked out and adjusting), and I would hate for one cat that doesn’t fit you to turn you off to pets entiretly. Just remember that cats can live long lives, 15+ years, so owning one can be a long committment. I don’t want to turn you off to having a pet, but it is something you should think about. Post if you have any questions!