What does it mean when every little thing someone starts to do annoys you, but you want to like them?

Perhaps it means you're a masochist ? Or not , in all seriousness though one of the best life lessons I've learned recently is " when someone shows you who they are , believe them. " Don't try and like someone just cos you wanna like them . I don't know if this makes sense but it does to me.

It means one of two things.

You need to become less self-absorbed and learn to tolerate others' foibles.

Or,

This person is such an irritating schmuck that you'd be better choosing another friend.

The good news is that you get to choose.

It means you're either married and have to learn to tune out the annoying things or you simply find this person irritating in which case don't hang around with them. 

You can't force yourself to like somebody if it were a natural attraction/friendship then you wouldn't find them annoying.

This means youre letting this person get to you but remember true love is overlooking each others shortcomings