help! i don't know if he's being a good bf or not!

Re
hey guys i need advice. so lately i've been noticing that my boyfriend doesn't really treat me as lovey dovey and sweet as he used to be and maybe even cares a little less than he did in the first period of our relationship, but it's been over a year now. i'm thinking "that happens when you're together this long i guess" 
but the other day this guy and i were joking around and he jokingly squeezed my boob and asked if my boyfriend would get jealous about it and i thought.... i really don't know. 
so i went to him and told him about it, and he found it humorous. and part of me wished he would say "ill go beat his ass for that" but he didn't he just said "well i guess i can't do anything i mean it is a pretty nice boob"  
i don't know if it's healthy for me to want him to get jealous , maybe he's just being a good boyfriend. help!!!