Dear Brian,  

The mentality that one should finish college before entering the seminary is quite common. I, frankly, think if a young man perceives he has a vocation and there is no further reason to go to college other than "getting a degree" (there are cases in which a spiritual director may recommend college because the young person has something he needs to work on before being ready for the seminary, that is quite different) that it is a mistake and a waste of time, and that is when apathy sets in. If you think you have a vocation but have not been able to verify it, you have the feeling of being neither fish nor fowl, and even the normal, wholesome campus activities can be upsetting since you don't know if you are risking your vocation or not.  

Now, here are some variables. One, there may not be such a problem if you definitely know you have a vocation and have made up your mind that in all your choices of courses, friends, activities, prayertime, social life, etc, you are going to favor your vocation. Two, there are several good Catholic colleges that have pre-theologate programs designed to support young men who know they have a vocation; that is a good option. Three, there are also several good Catholic colleges, or programs within larger institutions, that foster an active Catholic life, stimulating intellectual and spiritual development. While most of these programs will give you a good foundation in the liberal arts, upon which you will build your priestly studies (actually they cover some of the same content), you will not be receiving specific training for the priesthood there, and the environment will be helpful even though the human heart will always be the same.  

In your case, I think you need to speak to a priest, preferably one who knows you well or can get to know you well, to see if you are ready for seminary or not. If you are, you need to have a serious talk with your father.  

God bless.