<human>: Hello!

We are an international couple and I've had some jealousy issues about one girl. My bf is from France and has a lot of female friends/ spends a lot of time with them and I don't mind at all. However, there is one girl who used to be my friend (F,22) and they are quite close now. She lives in another country and they talk mostly online, they saw each other in real for the first time a few months ago. I know she used to like him a lot (he knows it) and before we started dating, he was quite flirtatious around her (online though), so I was nervous about his trip. I wanted to come along but she got pretty mad at me as she wanted him to spend the entire time with her and that it would just spoil their time together. But, he told me I should come with him but at the same time, admitted to her he wished they could meet in other circumstances.

Every time she is depressed, he is trying to comfort her sending her messages like "I've been thinking about you a lot, you are not alone, I miss you so much, you are awesome, can't wait to see you". In my country it would be considered as flirting and honestly, odd words to say if you are in a relationship. However, he says in France it is completely normal but he's been sending messages like that only to her as far as I know (maybe to boost her confidence?)

I think he does love me. He is really sweet and caring, we are going to travel together soon and even considered marrying if I have problems with my visa. But I just can't help thinking he has some deep feelings for her and then I feel so shameful for not trusting him. This is our first serious relationship, and I am very confused at this point. Should I let it go or is it just me overthinking about nothing?

Thank you! :)

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: My boyfriend sends a lot of "sweet" messages to his female friend and I don't know if it is me being jealous and crazy or it's absolutely normal.