To carry on or not to carry on?

I've been married for 7 yrs, but strangely our life isn't enjoyable. I feel unwanted as I'm always the one taking the initiative. Try to talk to him, but to no avail. Think bcoz we've knw each other for 15 yrs & the spark is no longer there, just going thro' some motion. I get really lonely at time since we've no kids though we tried hard for the past few years.. We don't quarrel alot, but ume we understand each other. He admitted started an affair last yr & I was quite sad. My marriage is now pending divorce, not bcoz I can't forgive. There is something really missing in our yrs of marriage, possibly our intimacy, our involvement & participation in each other's life, etc.. I feel sad abt letting go, after all, we had been together for so many years.. We did mention abt reconciling, but no actions.. I've move back to my parents' place & he stay alone. I'm still concern abt him, eg. if he now has new gf, come home late, but do not knw what's the points.. should I carry on?