I have friendship problems! Can you help?

Hi. I have two friends.Im not using names so i will say friend #1 and friend #2. Well me and friend #1 are like BEST friends.I go over all the time and we have so much fun and are so comfterable around eachother.It would kill me if we weren't friends anymore. But me and friend number two..well...I don't know. When #1 and number two are together without me,all I feel is rage,jealousy,sadness and betrayal.Friend number two wants number one ALL to herself..And I guess SOMETIMES I do too.But not as much as her.When number two gets mad at number one she rolls her eyes at her behind her back.When I tell number one number two did that, number one gets mad at number two and number two says a dumb excuse like,"I was rolling my eyes at someone else!"...But something about her just makes me happy.I feel SO comfterable around her. We were friends before number two and I were friends..and I feel happy to be around her..shes full of life and it's always fun with her.I don't know if I want to be friends with her or not...Can you help me choose?