Guys are guys - when they know they MAY be neglecting their gf,
they try to compensate it through buying gifts/presents at higher
worth, which they will eventually figure out that it will equate to
nothing in the end.
Problems of the heart can never be satisfied through material
possession, because if it does, its never love involved. You pamper
each other irregularly, like you enjoys an occasional sharkfin or
birdnest and NOT one blast on one occasion which you have to give
and you raise the value to substitude for your lack of attention
previously.
Don't keep quiet! That's the last thing you ought to do. But don't
trash it out with him because he did nothing wrong in a way.
Communicate and share you thoughts and ideas with him. Seek to
understand his work and his side of his story. Allow him to share
his pressure with you. Give him the benefit of the doubt when he
has done nothing wrong, yet. At the same time, tell him how you
feel. He has to know what's wrong, so that you don't one day trash
hell with him and him totally lost about what has happened in the
relationship.
P.S: Last time call everyday, go out all the time, etc - doesn't
mean this has to go on forever. Events in love is highly volatile -
be adaptable and making amends along the way in your love together.
In this way, your relationship will survive eventually - with a
little hardwork to fuel it.
Cheers