So basically my daughter who is 15 and 16 in December has had a boyfriend for nearly a year and a half, we like him and he's got really good manners. But we are scared boys only want one things, however I know my daughter is open with me so I know she would tell me anything she is worried about, she wants her boyfriend round today in her room, she does go to his house on a Friday and Saturday night and I'm fine with this. What do I do? Should I let them?