I'm thinking of stalking my boyfriend now that we are back together.
Why would you stalk him if you guys are back together?
I can't stop loving him, and I'm afraid that he might leave me for another woman.
You shouldn't stalk someone you just got back together with. If there were problems before you will lose that trust they began to have with you again.
But I need to keep tabs on him all the time.
It's not healthy to want to constantly know what your partner is doing. Stalking him, or anyone else, is an awful thing to do because it violates their privacy.