I mean we cant be happy all the time, were the early Christians happy being persecuted? Of course were in the 21st century, lots of temptations. Pray to the Lord, go to mass, and what has helped me is to be involved in the church. Go to bible study, become a eucharistic minister, or join a catholic group. Lots to do, yet sometimes it can be overwhelming when everything around us is shown to us like a carrot on a stick. Be persistent in prayer and stay away from sin as much as possible. Just like us, go to confession if needed, great to have!