Hungry For You by Lynsay Sands

Ok, so they are starting to get a bit similar. Basically, a immortal finds their lifemate. They fall in love and try to convince the person into loving them. Then they have to convince the person they've fallen in love with that they're not so bad even if they have fangs and drink blood. Maybe even that person wants fangs and a steady diet of blood too. I still love them and want to read every one she puts out. I've got the next one on my bedside table right now. :)