I need help

So the characters are me, kitty, and puppy. Idk why I used kitty and puppy but I just had cute little animals on my mind.

Anyways so I like puppy and have liked puppy for a while now, but puppy has a girlfriend who is terrible. She doesn't even talk to him at all and is cheating on him but puppy still decides to stay with her, it's so aggravating. Like please look past that scum and come home to me I can treat you so much better baby please. I'm getting off point anyways, kitty and puppy used to date so now they are ex's and kitty thinks that puppy likes her. Kitties reasoning was that he walked with her more than he did with anyone else.. Which is stupid cause when not walking puppy is around me and mostly talking to me and that was literally one time, the other times we were on bikes. I'm jealous of kitty if puppy likes her and that she got to date him before, I don't think that they're a good match at all and I don't want it to happen. Me and kitty were talking about it yesterday and that's how I found out she thought that puppy liked her. I was actually on the verge of confessing my feelings for puppy to her so she could help or something until I heard her say that so I stayed quiet. I don't want to feed into her delusions. I want puppy to want me. Not her. I want to ask puppy if he likes kitty or anyone else but I'm too scared to. What do I do..?