British cartoon, but not for kids
I watched it when I was younger, but I also found it on youtube before. It's a British cartoon with more of an adult audience. The mc is a thirty-something woman, plain and squat very Cathy-esque. The only episode I really remember is where she gains a lot of weight and starts dating a guy who only likes her for her size and keeps trying to feed her. Eventually she realizes and dumps him. Most episodes are about her appalling lovelife and I think she has some harebrained mother and typical bff as well. Maybe a pet cat.