That certainly doesn't seem like bad advice. After all, if he becomes a Christian, then there really is no longer any reason to not have a relationship with him. But I would remind you that the Bible tells us not to be
bound to unbelievers. Even in a premarital relationship (such as dating or courtship), a certain emotional attachment builds. And if you build that emotional attachment with an unbeliever, it can be spiritually harmful. After all, how can we pray "and lead us not into temptation," when we have already plunged headlong into it? I want you to know that I have prayed that God would make his will (whatever it may be) known to you, so that you can do it.
Consider this also. In a relationship, it is not ideal that each person should retain their faith, but that both persons should be believers in Christ. After all, the ultimate end of a romantic relationship is marriage, and religion can become an important issue. For example, would you have your home desecrated with Hindu idols? As it says,
The cup of blessing that we bless, is it not a participation in the blood of Christ? The bread that we break, is it not a participation in the body of Christ? Because there is one bread, we who are many are one body, for we all partake of the one bread. Consider the people of Israel: are not those who eat the sacrifices participants in the altar? What do I imply then? That food offered to idols is anything, or that an idol is anything? No, I imply that what pagans sacrifice they offer to demons and not to God. I do not want you to be participants with demons. You cannot drink the cup of the Lord and the cup of demons. You cannot partake of the table of the Lord and the table of demons. Shall we provoke the Lord to jealousy? Are we stronger than he? (1 Corinthians 10:16-22)
Furthermore, would you raise your children as believers in Christ, and heirs to the covenants of grace? Or would they be subjected to a life of idol worship? I realize that being a college freshman, marriage is a long way off for you, and children are even further away. But again, a relationship can have consequences, both good and bad, long into the future. Therefore, I think it is important to carefuly and prayerfully consider this.
Now Hal, I realize that it is difficult to discern the will of God from the conflicting posts here. If I may be so bold, I would like to invite you to post your question on the Baptist forum, so that you can discuss the issue with fellow believers. Everyone there is quite friendly, and there are many spiritually mature believers who would be able to offer helpful advice to you. Please feel free to post a thread there, if you wish.