a person who's obsessed or addicted to love is called loveholic. Loveholics tends to reminisce about their past love life, depressed with mental disorders cause by love completely indulged in hallucinations. Their mind progress only of love.
My friend's a loveholic, shes taking prescription drugs but there isn't any sign of improvement.
someone who is constantly with their boyfriend or girlfriend, and when hanging out at a party sits in a corner with there significant other ignoring all other friends at said party.
Look at those loveoholics over there making out, I think I am going to leave before it gets too awkward.