[mireOpekrhype]

If your mother wants to marry him, then let her. She wouldn't even be considering marriage unless she wanted a husband for one reason or another. Don't stand in the way of her marriage just because your friends might think it's weird or just because you think it's weird. As long as you are happy with his deen, then let her marry. Do not stand in the way of this bro (if his character is agreeable from an islamic perspective). I can also understand what you are going through but we must also look at it from your mothers perspective; imagine if you were at her age and without a wife despite wanting one, would you be happy?