[AnnieK]

If this is really out of character Amy, is there any way your mum could have seen / met / know of him before. It seems an intense dislike and if she's not like this with other guys you've dated could she know something about him that she's not telling you. I would sit down with her and have a chat and ask her to be honest. Tell her you really like him(if you do) and thats its important to you for her to give him a chance.

Hope it works out x