How much do I mean to him?

Men do not necessarily experience the need to be with their partners all the time. A man can be fascinated with things like his job, sports, computers, etc and at the same time truly care for his partner. Men's criteria for caring for somebody could be "how much am I ready to sacrifice for this person in case of danger?" instead of "how much time should I spend with this person?".

I think that you should feel that you are one of the most important things in your boyfriend's life.  I know that weekends are nice with him, but if you feel like there are opportunities in which he could show that he loves and cares about you, but doesn't, this could be an inclination of a lack of commitment from him.  Of course he has a certain level of commitment to you because you are together, but a man also needs to be committed to making his girlfriend feel wanted and to making the effort.  This is just food for thought.  If you feel unwanted, then I think it's time to move on.  But, of course I would try to talk to him more and see if there's a way that you can help him to understand how you're feeling.  Give him a chance to change.  If nothing changes, maybe someone else could make you happier.

I do feel for you as my partner is quite the same at times, but I think it is a natural breed for males to act the way they do, so long as he has assured you that he loves you and wants to be with you, you should be greatful for that, you cant change a person to be the way you want them to be, it will just turn around and bite you on the bum one day.....just relax and try to do other things to keep you busy at the times he is not around..I hope this helps!!!

You might want to read a book called "He's Just Not That Into You" and see for yourself what kind of messages he may or may not be sending.  This book is often said to be like the biggest help of many women's lives regarding just that question.

It is always better to talk with your partner and to tell him how you feel. I think that the most disturbing thing you said is "I just want to feel important to him" . That is a big problem you don't have to want it it has to happen by itself it doesn't happen then maybe he is not the person you are looking for to spend the rest of your life. Again talking with him and explaining your point of view is the best advice i can give you .