<human>: I have been seeing my boyfriend for about 2 months now and i'm starting to get emotionally invested in him but i'm worried this may be a bad idea.

 He was in a relationship with his ex for 6 years and they lived together, and she has a daughter. (He was 18, she was in her mid 30's at the time) During this time the daughter was only 4 years old (she is now 10), and I found it admirable and mature that he decided to step in as the father for her. The reason why they broke up is because of the age difference (she is now in her 40's), and he wants to start a family of his own one day. They are still good friends, however.

Before I get too emotionally invested in this relationship, I really want some advice about this. He has not told his ex about me and mentioned that he isn't sure if his ex is seeing anybody either. As supportive as I want to be, i'm finding it very difficult to be hopeful. He does not tell me a lot about the relationship he has with his ex, so i'm not sure how often he sees her but I assume it's very often because of his responsibilities for his daughter (he takes her to the gym, piano lessons, shopping, etc.). He also mentioned that prior to dating me they still had a friends with benefits relationship. I can't help but worry that there could still be old feelings involved. I'm not sure if i'm overthinking this. 

When we are together, everything feels great and he's really sweet and affectionate. He used to live with his ex but has since moved in with his parents after they broke up. He's planning on moving out, and has mentioned the idea of me moving in with him. Is it wrong of me to feel worried?

Can you condense the text into a few key points?
<bot>: boyfriend of 2 months has an adopted daughter of 6 years with ex, doesn't tell his ex about me and were previously friends with benefits. I'm getting emotionally invested with him. Not sure if I should stick around.