I was born with Longhorn fan genes so I guess I was more prone to addiction than most. When I was growing up, I didn't even know it was a rivalry b/c we always beat aggy. Then, in the early 70's my sister's husband went to aggy and joined the corp. All I heard for 4 yrs was "this year we're going to beat tee-you". Never happened. After the moron graduated, aggy finally beat us and were 10-0 and top 5. My sister and her ct husband (now ex-husband) invited me to go up to arkansas to watch aggy play in the last game of the season. Arkansas' qb got hurt and the backup came in and beat aggy 31-6. I was hooked, I giggled all the way back to Fort Worth.
Don't blame yourself, it is a disease for which there is no cure. Watching old films of us dogstomping aggy can be as good as methadone treatment. (you might try youtube). Once your physically addicted, it will be a day to day lifelong battle. Fortunately, addiction is rarely fatal (although I think I probably suffered a near fatal OD on the way home from ark as I'm certain that my brother -in-law had thoughts of killing me and dumping my body - I don't have any recollection of the near-death experience, I only recall the euphoric, extreme high).
I hope you take solace in my experience. Don't get discouraged, aggy can even go 10-0 and still embarrass themselves mightily, they were doing it 30 yrs ago when I was but a wee lad.
Here's a positive thought for you to dwell on. Soon, we'll be off aggy's own rivalry radar and none of them will even remember ever winning against "tee-you", then they will start referring to their real rival as "u-b".