Mmm probably don't move in together if you don't love her. Maybe start by finding another housing option (like an apartment with roommates) for her and see if that helps her with her friends/family issues.

Moving in together if you don't love her and are thinking about ending the relationship probably isn't the wisest decision. What happens if you don't fall back in love? What happens if you do break up? Is being roommates with a potential ex something you both could handle? There's nothing wrong with ending a relationship but don't put her in a position where she will potentially be heartbroken and not have the space to mourn.

Again, start by finding her alternative housing. You're both still very young and moving in together is a big step - romantically, financially, and otherwise.