I guess communication is the key. If you are angry at him (which makes sense), he might not understand and the situation could deteriorate. Keeping it all inside is also hell and will only gnaw at you. Have you tried talking to him about it? About you feeling left out & basically just needing him to be a little (more) romantic etc.

Of course, without being accusatory, just to reminisce the good times and how to recapture them because you miss that and you *need* that. I don't know how he usually is with you but maybe he just needs a little ‘reminder’... Is he receptive or willing to do so?