Building a relationship with a first-ever boyfriend?

The only thing you can do is continue whatever it is that you are already doing. Just be yourself. Learn to accept yourself as you are, without judgment. That means, no guilt trips, no regrets, and learn how to deal with what the universe presents to you and there will be no disappointments. Life carries no guarantees other than it will end, sooner or later. How you live it is up to you. So live each day by itself, trying always to do the best you can. Live up to your own potential and hold yourself to your own highest standards. Be honest with yourself and choose wisely. If you do this you will find you will be attracted only to those people who do the same. So honor yourself by the choices you make. If your bf is of a similar nature, great. Keep being yourself and he will continue to see you as a worthy partner.