We've been together for about 3 months and she's been acting strangely lately. she left her cellphone in the room and I was curious so I looked into it and saw what I didn't wanna see. She told him she loves him and misses him. They do have a 2 year old son together. I confronted her about it and she was upset with me. Not sure what to do about it. Everything was fine until this. weve been talking about getting married in the future. I need help..