Am I tripping?🤔🤔🥴🥴

Okay, need some advice, my guy's uncle just passed and I'm not sure if he is just in his feelings right now or what but...he has kids from a previous relationship and the mother took them to see his family(we stay 3hrs away) so after that visit, he sent her a message saying "Thank you for what you did and I LOVE YOU..and I thank you for taking care of the kids...and she sent one back stating she loves him too...now was this out of line or am I taking it the wrong way? We have been together for sometime and we have a child together and I have told him a million times if I'm not the one..please don't drag me through the mud..but he continues to say I'm wrong..