Relationship advice? a penny for your thoughts?

Is it normal to see other couples and think “I want that”. I’m talking about relationship not as in I want that person. My bf and I been together for almost 2 years and lately I’ve been feeling meh out our relationship. When I’m out and I see couples being cute and going out I get kinda jealous. Like I really love my bf but lately it seems like he stop trying. Like I call him and he’s like “I can’t talk bye” or “I’m listening to music rn I don’t want to talk” or if he’s out with friends he says “I’m with my friends talk to u later bye” but never gives me a call back. Or we’ll have a very short talk then he’ll say he has to go. I noticed lately I’m the one doing the chasing. Like I’m always asking him when are we going to see each other or if he’s free. Idk I just haven’t been feeling wanted lately so when I see happy couples out and about I get a little jealous. I have had this talk before to my bf about how I feel like I’m doing the chasing and he always just says “sorry I really love u but I don’t let me chase u because your always beat me to it. I’m sorry I’ll step it up.” Then he would step it up for a month or too then it does out. but I don’t think its hard to give me a call from time to time or at least show interest to seeing me.

Idk why I’m feeling like this. Idk If im not happy anymore or we just hit that comfortable phase of our relationship. Idk I kinda just miss how he used to be “obsessed”(not in a bad way) over me. Now I feel like it’s just one sided.