Hi there Lisa
It is always nice to be nice. To show your niceness is deepening your connection with your partner, and revealing your true intentions for them. Some of us guys will almost never say the word 'love' to, or back to, their partner early in the relationship, for certain reasons:
Because he may feel she may lose interest because he has shown full intent (& to some guys, this may mean letting his guard down.) (Possibly because of past relationship experiences.)
Maybe he likes to keep his lady guessing by not saying the 'L' word, to early on, and needs to make sure everything really is OK between you both..
Maybe he hasn't really decided if he DOES really love his gal, yet, and so does not respond back with the same 'love, VERBALLY' as she does him. Because he continues the relationship whilst still deciding if she is the one.
But all in all, to be nice in your relationship is a bonding that needs building and re-enforcing. To say to his face is special, as your sincere energy accompanies your words & body language. And to text is a must also, to stoke the fire for when you are physically together.
Many regards, Dale