Is my husband just having a sex fling or is he truly moving on?

I decided to start a divorce process with my husband. We still live together but are going through divorce. But since then i have been going through his phone and I see that he has been talking to a girl. He is very adamant and persistent about this girl. He blows up her phone and calls her back to back especially if she’s not answering him. I’ve read in their messages that he’s had friends contact her on his behalf because she was ignoring him. He introduced her to one of his closest friends & asked her to meet his family. In his call log They talk for hours on the phone. They have very long conversations and are on the phone for at least 3 hours. They must be sleeping on the phone together because the hours are ridiculously long. In the messages it implies that they have not had sex yet because she’s not ready yet. He reassures her that it’s not all about sex and that he’s willing to wait until she’s ready. He’s constantly telling her that he’s serious about her and trying to convince her of that. He tells her that our marriage is over and that he’s done with me. They have loads of text messages. They talk about kids and the future there are very long messages about all of that. In most recent messages He told her that he has feelings for her and that he loves her and asked her if she loves him as well. He talks about helping her with things in her life , telling her he misses her, calling her “baby “ , planning dates & future trips smh. I get mad just writing this. My question is could he just be sweet talking this girl? I know men often do this just to have sex with a girl. Does it sound like he’s really moving on? I’m hoping your answers will be not to worry because he’s just sweet talking her cause men often just say meaningless things to get sex. But I’d like honest answers on what this situation with this girl seems like to you all. Is he really moving on from our marriage this fast? I’m too embarrassed to ask my friends and family. HONEST ANSWERS
Is my husband just having a sex fling or is he truly moving on?
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