Making others happy

It's getting to the point in my life where I can't work out whether this is good for me anymore. If your actions hurt the ones you love deeply then what's the point? Why bother? No pain no gain..maybe? Or forever pain and no gain? I don't know I really wish I had the answers to these questions but I don't. I can't live my life for others but at the same time I have to consider their feelings. Some would say what about my own. Only if I could remove them or switch them off. Feelings make everything in life more complicated. Thats my philosophy on happiness.