How to tell if my iphone is being tracked?

I have an iphone but the account is in someone else's name. We're both adults. Does that other person have ability to track me? See my texts? How would I even know? He seems to know an awful lot about my comings and goings and I know he uses something to track the children on the account. How can I tell if I'm actually being tracked? If I log onto icloud is there a history where I can see if someone has been using it to track my phone?

Added (1). The phone is mine and I've answered my own question. I logged into icloud. He had been looking at my calendar, my contacts and also tracking my movements via my phone's gps from there. You can turn off icloud sharing from your phone and change your password to protect against this type of invasion of privacy. I completely trusted this person with my account info and had no idea that the icloud could access this much information. Shame on me. Never again. I don't blame my answerer for being suspicious. Some people, evidently, are incredibly deceitful.

Your story raised some flags, which leads me to suspect you found/stolen a iphone and want to see if someone is trying to find it…

  • My iphone was stolen. Find my iphone tracked it 15 miles from my house. Should I call police? It happened two weekends ago and I don't think the person ever turned it on until today but I got an email saying it was turned on, lost mode was activated so it locked itself, and it has tracked it to a city about 15 miles away from my house at an apartment complex. I don't think it would be necessary to go there and start knocking on doors. Should I contact police? Its an iphone 4.
  • IPhone being tracked via Wi-Fi? My brother found an iPhone5 a week ago at the mall and decided to keep it. (I know he's wrong for that ). He took out the sim card, turned off the location services & the findmyiphone thing. The service is now off. I guess the real owner took the service off. He connected it to iTunes and restored it to a new phone. Now all the data's erased. He connected it to our home Wi-Fi & now he's all worried that they could still track him. Can they?
  • If my iPhone is being tracked by GPS not using any apps, how do I turn it off from my phone? Can I just turn off my location services or do I have to do something else? Will putting my phone on airplane mode do the trick? (the gps system is not using cellular data)
  • If i turn the location services off on my iphone can my iphone still be tracked? Okay my mom has a tracker on my phone and i don't want her tracking me all the time but its okay sometimes, if i turn the location services of on my iphone will she still be able to track me? And if not will she know she can't track me? Also will i be able to call and text on this setting? Please and thanks peeps!