My roommate has a pattern of getting angry when i sleep at my gf's house?

[vanessa]

i know it's not because she has a problem with me dating a girl because she knows i'm bi and doesn't know if i just started dating a guy or a girl. i think she's jealous because she's lonely. the last time i spend the weekend there i left 2 or 3 plates in the sink for 2 days that weren't that dirty and she had a nervous breakdown when i came home and threathened to move. i spend another night there days ago and came back sun afternoon and she treathened to move again and complained about cleaning. she doesn't see that there's a pattern. she also copies everything i buy for food. she's a bit overweight and she copies everything i buy. if it's the first time i bought blueberries she sees it and buys them 2 days after. if she sees i bought a certain cereal she buys the same one. if she sees i bought yogurt she buys it. she basicly copies every food i buy because she's trying to lose weight and i'm skinny so she thinks she should eat the same foods. i find it a little creepy though. i feel like she hates it that i have someone and she doesn't and tries to get back at me and leave me to find a new roommate. we have separate leases with the landlord.