Help, I miss my dog

It was as if the illnesses that come with her age struck her suddenly, she was fine like a week before It happened

I don't know what to do; my house is filled with her memories, sometimes I even think about warming her foos up. This Tuesday will mark a month since she passed away, but I feel as sad as when it happened

I used to take her for walks every day, but I feel guilty because sometimes I was too lazy and I didn't enjoyed properly the time with her, and now I'd give anything to take her for a walk.

I don't even speak english, but I couldn't find a spanish-speaking community to talk about this. I think a part of me died with her; she was my best friend since I was six, I have a good relationship with my family but rn I feel so alone. I feel like I just lost the only being who loved me unconditionally

What do I have to do to stop feeling this way? I really want to move on because all of my memories with her are sad now. I wish I could have done more for her.