Long story short; my DP left me to go back to an old flame and then left her to come back to me and our DC....I love him and think his earlier departure was down to work/kid stresses....He tells me he hasn't seen or heard from her in weeks but I am not sure I believe him as he is secretive with his phone....he has switched off his notifications, always has it on silent and NEVER uses it when I am around. This is not typical for him however I note that when he is in work he is on IM constantly and never to me.....I knew taking him back would be hard but I didn't think my levels of paranoia would be this high.....DC are glad he's back, as am I but I do worry that he could be messing around again....was going to contact OW to find out....what do you think?