How can I tell him I still love him and want him back?

I think dinner and all is fine but you want to be careful. There is a fine line between asking and begging when it comes to matters of the heart. Don't ask...suggest...In a relationship it is a mutual thing. You both have to want it. Have dinner and go some place quiet to talk things out. Start off by commenting on why you guys split up in the first place, then tell him that you miss him and you can both work those issues out if he would like to give it a try. Then tell him not to give you an answer right now but rather think about it and let you know later. By doing this you are not begging and you don't sound desperate.

I know you love him and want nothing more than to be with him night and day but it has to be mutual. You both have to give and take in a relationship. It can't be one sided. So if wants to make the effort and get back together then go for it, but don't force the issue at dinner. Just plant the seed and let it grow on his mind and then later follow up on it. See how that srategy works for you. Let me know how it turns out. Good luck.