B.) serious and impersonal
Answer:
Pretty sure it is the second choice.
Explanation:
First, you have to talk to your crush a lot (through any social media apps and in real life) and get to know her really well. Then, you gotta take her on a date (maybe saying like, "What are you doing this weekend?") If your crush isn't going anywhere, you can ask him/her to go to an interesting place that would entertain him/her. If everything went well, you gotta build a relationship with him/her until you finally asks him/her to be your boyfriend/girlfriend. Then, he/she might be your fiance one day and have a family.
The End.