There’s no point in going through the motions just because people you know expect you to. Unless the experience is going to be valuable and of lasting benefit to everyone who comes, a funeral really is just a waste of time, money and emotional energy.
How you feel will depend on:
The age of the person who has died
The circumstances of their death
Your feelings towards the person who has died
Your feelings about whether it is necessary to have the person who has died present at the funeral
The expectations and needs of the people who knew the person who has died
Whether a conventional funeral can achieve what you are hoping to accomplish
Or whether an alternative sort of farewell event would do that better
You may even conclude that you don’t want to mark the death in any way at all if, for example, you were estranged from the person who has died. That’s perfectly okay.