At some point, every little girl grows up, and there will likely come a day when she brings a boyfriend over to meet you. Even if you don't always see eye to eye, making your daughter's boyfriend feel comfortable in your home can be the foundation for maintaining a close and open relationship with him throughout the duration of their relationship.
Welcome him at the door. Don't wait for your daughter to enter your house before greeting her and her boyfriend. Meet them at the door and be ready to give him a handshake, or if you feel comfortable, a hug.
Tell him that you are glad to see him. Although this may seem obvious, making the effort to let your daughter's boyfriend know that he is a welcome guest in your home can help to lower his guard.
Engage him in conversation whenever you can. You may discover that you share common interests and hobbies that can give you the opportunity to spend time together.
Avoid getting too involved in their relationship. Although you may only have your daughter's best interest in mind, give her and her boyfriend the privacy and space that they need to make their relationship work.
Don't be rude, brash or insulting to your daughter's boyfriend. While this too may seem like common sense, even if you are just joking with him, insulting and rude behavior may make your daughter's boyfriend feel uncomfortable and unwelcome in your home.
Invite him back before he leaves. Extending your home to your daughter's boyfriend can make him feel welcome and wanted whenever he visits.