Dating meet and marriage
The other variant - you dating met with girl and felt that can’t imagine your life anymore without her. If it happened like this - be honest, say her the true, looking in to her eyes (but first find also her interest in you =)). Say that you had meetings also with some other girls, but meeting with her changed everything and now she is the only one.
In this way your honesty will reward! Your lady will understand that you are serious not only in your meeting, but marriage and in and building of your future life. Again - don’t forget, if you will have meetings with some girls, inform them about it not in your letters, but during your meeting of after it.