AITA for cheating on my husband of 5 years

I'm sorry that you were forced into a marriage neither of you wanted; nonetheless, I trust you can take "Kinsey" as something good that has come from all this.
From the sounds of this, it sounds like it's just a loveless marriage; by this I mean that it's not an abusive marriage per se (feel free to correct me if I'm wrong). If that's the case, then I wouldn't do anything until after Kinsey's birthday. After this, you may have two choices:-
a) Make a clean break, and start proceedings for a divorce or annulment (if the marriage was forced, I think that would qualify for an annulment, although you won't have the same legal rights as a full-on divorce). I don't know the circumstances, but this may be better for your child in the long run. Children can pick up on negative vibes between the parents, and this may be more detrimental than seeing one parent during the week and the other on weekends. I don't know how your respective families would feel about this and / or what action they would take, so you'd have to factor all that in.
b) Keep up a façade, and stay married as far as everyone else is concerned. I know you mentioned "Richard" flirts with other and makes some unpleasant comments to you... but what is the relationship like between the two of you? I mean, would you consider yourselves as like "mates", where you can have banter and it's all good, and you're comfortable with each other? When I was at Uni, I knew a Muslim "couple" where he was gay and she was a lesbian. They were very close friends, so they kinda entered into a marriage of convenience. To each others families, they were happily married, but in private, they would both do their own things. They both agreed this was a better option than coming out to their families and risking the potential fallouts. As far as I'm aware, they're still together, although I don't think there are /were any children involved. However, if I'm wrong, and you're genuinely uncomfortable around him (for whatever reason), then this clearly isn't an option

Thank you for the advice I think I’m going to divorce Richard a couple weeks after Kinseys birthday as for the comments he’s made it genuinely hurt me but he’s a really good father I think we might work out a custody situation

Sounds like that it would be best for all if you were separated. Better for your daughter to see you guys when you can at least be civil to each other, rather than her picking up on bad-vibes... and who knows how that might affect her.
Best of luck

I know it sounds bad but let me explain. My husband Richard (M50) and me (F30) were forced into marriage by family. None of us have an emotional or sexual connection with each other but we managed to have a little girl we will call Kinsey. Kinsey is two years old and I love her so much but I don’t wanna be married to her dad anymore. Richard was also flirting with others especially other men and he also made mean comments on my appearance and cooking. I’m scared our splitting up would hurt our little girl her third birthday is in 2 weeks what do I do.

Ma’am, this is a student forum.

I know it sounds bad but let me explain. My husband Richard (M50) and me (F30) were forced into marriage by family. None of us have an emotional or sexual connection with each other but we managed to have a little girl we will call Kinsey. Kinsey is two years old and I love her so much but I don’t wanna be married to her dad anymore. Richard was also flirting with others especially other men and he also made mean comments on my appearance and cooking. I’m scared our splitting up would hurt our little girl her third birthday is in 2 weeks what do I do.

I talked to Richard about it and he flipped out and said if we divorce he’s taking Kinsey I’m genuinely lost and don’t know what to do!

I don't want to come across as harsh, but I don't think this post is genuine at all. Not least because you've gone from not knowing what to do, to deciding to divorce your husband, to then speaking to your husband about it all in the space of 12 hours. That is not how things go in the real world. This just reads like someone imitating a Reddit thread.
However, in case there are people who genuinely need this advice in future, I most certainly agree that it is generally better for children to separate than to stay in an unhappy marriage. It is not unusual for there to be disagreements as to who the child lives with and spends time with, but the family court is there to resolve those disputes. As much as there will always be a status quo as to where the child lives following a separation, you would generally expect the child to stay in the family home while the issues around the divorce are finalised. Even if your other half does 'take' her, if you apply to the family court for a child arrangements order, a judge will consider relatively quickly what the interim arrangements should be whilst the case proceeds. I appreciate that litigation is never something that people want to do in this sort of situation, but that is why the family court is there. Him threatening to take her is not a reason to not get the divorce that clearly needs to happen here.

And why name their daughter after a famous sexologist???

I think it's a name for the sake of the thread, but it is equally something of a tell tale sign that someone reaching for an anonymous name for a child would go there.

I didn’t even know Kinsey was a sexologists name and yes it’s for the sake of the thread I don’t wanna put my child’s real name out there. And also this is actually happening I act on impulse and the first thing that comes to mind I just do it probably not the best but I’m working on it a bit.

The name must have been in your mind somewhere when you wrote your first post.

update

My husband lashed out and fought with me for custody but I won he currently has no visitation rights

You had a full custody battle in less than four weeks? Now we really are in the realms of fantasy.

I was going to say I’d be amazed if you could get a hearing date within a month.