No, it is not. Not breaking your baptismal vows is the legitimate concern.
If the lady you may date in the future is not satisfied without sex before marriage or even expects it, it is a clear sign that something is not right in the relationship. Good communication - and a good sacramental life - may fix this issue. Otherwise, it is more than sufficient reason to interrupt the relationship. Dating and marriage are supposed to take us onward and upward, not towards the fires of hell for the sake of the flesh.
Also forget the world, and do not succumb to it. Paul admonishes us:
Do not be conformed to this age, but be transformed by the renewing of your mind, so that you may discern what is the good, pleasing, and perfect will of God.
Those who live according to the flesh have their minds set on what the flesh desires; but those who live in accordance with the Spirit have their minds set on what the Spirit desires.
For the wisdom of the flesh is death; but the wisdom of the spirit is life and peace.
Know you not that the unjust shall not possess the kingdom of God? Do not err: neither fornicators, nor idolaters, nor adulterers, nor the effeminate, nor liers with mankind, nor thieves, nor covetous, nor drunkards, nor railers, nor extortioners, shall possess the kingdom of God.
Whoever sows to please their flesh, from the flesh will reap destruction; whoever sows to please the Spirit, from the Spirit will reap eternal life.
For if you live after the flesh, you shall die: but if you through the Spirit do put to death the deeds of the body, you shall live.
Now concerning virgins I have no commandment of the Lord, yet I give my advice, as one that has obtained mercy of the Lord to be faithful. I think then that this is good, on account of the present necessity, that it is good for a man to remain so as he is. Are you bound unto a wife? Seek not to be loosed. Are you loosed from a wife? Seek not a wife.
I am saying this for your benefit, not to place restrictions on you. I want you to do whatever will help you serve the Lord best, with as few distractions as possible. I say to the unmarried and to widows that it is good for them if they remain even as I. But if they cannot control themselves, they should marry, for it is better to marry than to burn with passion.
At 16, you shouldn’t be thinking about dating.
Dating is to discern the vocation to holy matrimony. Do you think you can marry and be a father at your age? Should you rather not be concerned about your instruction and fitness, that when you become of age you may provide for your spouse and offspring? Do not follow the way of the foolish, who say to themselves: “Let us eat and drink and have fun, for tomorrow we die.” Serve the Lord with joy, and let His will be yours.
Be open, in a prayerful and chaste way, to the will of the Lord. Propose, do not dispose.
If your vocation is matrimony, you will in due time meet the woman that God has called to be your spouse. She will not want to do anything that would sully your soul. She will want to sanctify you and purify you, and she will expect and demand the same from you. By her side you will become and feel like a true man, a man in Christ, whose vocation is to sanctify his bride and keep her spotless until the last day.
Remember that the sexual union within marriage, with the sacred unitive and procreative purposes preserved, does not stain the spouses’ soul, but rather, sanctifies them and glorifies God. For you to be able to accomplish this, you need to learn about the holiness of marriage and of sexuality, and you need to strive to achieve self-mastery and control over your body and passions, living as all true disciples of Christ, in chastity and celibacy until the time comes to either marry or make vows.
A good place to start is to study St. John Paul II’s Theology of the Body (Cristopher West has some amazing video presentations on this) and to try to attend Mass frequently, confess often, and pray even one decade of the Rosary daily. For it is known that in the fight between the prince of impurity and the Virgo Castissima, the frail Rosary binds a soul to heaven with the might of God’s hand.
I wish I had your mindset when I was your age You are brave and strong. Stay that way. God bless you.