Depends on what you mean by love potions or spells.
If you're talking about something to make or force someone to fall in love, well no that can't work simply because love is given freely. It cannot be forced. A spell or potion that forces love is really only forcing slavery. That's not love, nor does it have anything to do with love.
If you mean something to enhance mood like an aphrodisiac, well sure, there are plenty of aphrodisiacs around, both natural and man made. Perhaps that little blue (or is it red?) pill could be regarded as a modern kind of love potion.