How can I motivate a dynamic model using utility and consumer preference where only one good is affected by past consumption? I've been looking how I can motivate the model I want to estimate using a utility optimization framework. Basically, I want to write a model using two goods: x and y, in two periods: 1 and 2, where the optimal amount of $x_2$ is negatively affected by the amount $x_1$ that was consumed in the previous period. For example, a person's preference between Italian (x) and Thai (y) restaurant at period t should depend on whether or not a person Italian food at period t-1, so consuming $Italian_{t-1}$ should negatively affect the optimal amount of $Italian_{t}$ by some proportional amount. The nature of the problem rules out the Discounted Utility Model because it assumes consumption independence. I read about alternative such as habit forming models,but these models describe the opposite of what I want and can lead to intractable. Any reference or help will be greatly appreciated.
I just wanted to clarify on Starfall's comment a bit. $\phi$ can be a bit confusing.

Let me appeal to Chris Carroll who uses the CRRA utility function $v(\frac{c}{x^{\gamma}})$ where $c$ is consumption, $x$ is the habit, and $\gamma$ is the "importance" of habits. In this framework, $\phi$ can be seen as the speed at which habits catch up to consumption. If $\phi = 0$, then the consumer is constantly maximizing their utility with a constant multiplicative factor in the denominator of the function's argument. If $\phi=1$, then habits collapse to last period's consumption.

There are a number of interesting features from this model. For instance, if persistence is low enough then the intertemporal elasticity of substitution tends to zero. It is used famously in the asset pricing literature to explain the excess return premium puzzle. The development of habit formation theory in microeconomics (both theory and econometrics) is slow but finally arriving. 

Resources:
http://www.econ2.jhu.edu/people/ccarroll/HabitsEconLett.pdf
http://www.isaacbaley.com/uploads/6/7/3/5/6735245/lecture_7_baley.pdf