Treefrog, at some point you are going to have to sit down with Nathan and have a heart-to-heart talk about your relationship. You are walking a fine line on timing; too soon or to late, either one, would be bad timing. While several, including myself, have urged you to take it slow, be alert for the right time. If his friends are urging him to date you, you might want to approach them. This would reinforce their convictions about you and Nathan and they may be very helpful. Use caution, be alert, be ready to seize the opportunity.
Best wishes.