Should I break up with

My husband he’s acting fishy around his phone and I don’t know what to do we been together for six years and I don’t know if I should break up with him or not .. he supports me financially 100 percent.. that’s why I’m scared to leave I do have a car under my name and some money in my bank account.. and I have a son that’s almost 10 I don’t know what to do there’s days where I don’t feel happy anymore with myself or with him. But I’m scared I’m going to struggle without him ..