How should a teen love his girlfriend?
Compliment her, let her know she's beautiful no matter what she looks like at the time. Tell her you love her. Kiss her for no reason. HOLD HER HAND IN FRONT OF YOUR FRIENDS :). But most importantly, let her know just how special she is to you. Tell her exactly how you feel, even if you're scared to. Honesty is key :). Also, don't smother her. Be there for her, but don't be that person who follows her.