Drunk Tess!
After seeing Max & Liz go down the path of reconsiliation, Tess decided to drown her sorrows when she tried Sean's beer. She proved that she isn't a girl who could hold her liquor when she got drunk after one mouthful!
This, however, also loosened her tongue as she told Liz in front of the rest of the group that if it wasn't for her then things would be different in her life - that she would have a purpose, and she wouldn't feel like an outcast amoung the group.
When Max defended Liz, Tess soon turned her anger on him and broke down in tears as she told him that she wasn't to blame for how things are between him and Liz - destiny is.
Whatever she meant, Roswell's Big Brother isn't sure about but we will keep watching to find out!