Is it normal that i have a secret desire to dump my friend?

I have been friends with this person since 4th grade and we've been pretty close. I play Roblox with her a lot and we go to each other's house's sometimes. But now she's starting to bug me. A girl has started to hang out with us and I was outraged to know that they were secretly texting each other at night. Also I think she is way too nice because sometimes she gets horrified if I squash a ladybug or something. Also she loves dogs. I'll admit that I don't like dogs that much since her dog tried to tackle me once. She also likes to laugh and act crazy around her "other friend". Am I jealous or is this normal?