It does happen to all young couples after one year of
relationship, some even start to get cold after six months of r/s.
Maybe you both need to sit and talk about your future but then I
guess since ya still studying why not finish ya course first? Since
he's more mature than you, then he did mention he's getting nowhere
in your relationship, sounds contradicting. Most important of all,
love yourself first 
Wish ya good luck for
your future undertakings ...
