You don't have to. Anything is fair game unless you're exclusive with someone. So don't be if you don't intend to.

I am trying to do MLR

Fair enough...how about the jealousy ? That's probably what I should have said in my post. These girls get jealous...and start acting weird.

I am trying to do MLR

I'm not familiar with that term.

However, them getting jealous is not something you can control. Damage control is the best you can do if you wanna keep them around.

All in all it's still like I said, as long as you're not exclusive with someone, they should know everything is fair game.

Assuming you mean multiple long-term relationships... which shouldn't that be MLTR?

It doesn't sound like you are doing that. You're lying to a few women, or at least hiding the truth.

If you were actually seeking long-term relationships with them, they would have already known you were dating other girls because you would have told them and everyone would have agreed to an open relationship.

If you really want multiple long-term relationships, you should seek out advice on polyamory forums rather than pua forums. This place is mostly about getting the girl, polyamory forums are about how to have good MLTRs.

Damage control blows...or I can just brush it off...if that's a thing

Well yeah but when you're in a relationship with multiples women, they're either cool with that or not. Besides hiding, once you get caught damage control is pretty much your only option. Brushing it off is a form of just that.

I'm not really qualified to give a proper answer since I don't do that. I will date multiple women until I decide I want to be exclusive with one, but they all know what's up.

so you guys recommend me just saying it flat out in the beginning? I get called a player jokingly, so to me that's an unsaid "hey I understand you talk to other chicks". And I just go with that

I am getting to a point where the girl assumes I am seeing other girls.

I try not to do long term things...

such as seeing them more than 2 times a week. There are some guidelines I am following right now that I found on this forum. This place isn't a single serving thing. Some of the guys here are in multiple long term relationships. That's why I post here...But I should check those forums out

Obviously not.
But you are trying to do "Multiple long term relationships."

Plus you want that whole "relationships" part too.

So, here's my guess as to what's going on:

You only see each girl a couple times a week.
When you see them, you act in a manner that communicates _more_ than just casual sex.
Girl starts to assume you're developing feelings towards a relationship (which you claim to want, but with more than one woman.)

Most women assume the growing relationship part goes along with the monogamy part.

Now, you need to figure out what you really want.

Do you want actual loving, caring relationships with multiple women?

Or do you want several fuckbuddies?

If you want the former, you need to communicate and be up-front.

If you want the latter, you need to make sure you're keeping things casual and not unintentionally communicating any deeper feelings. Also don't expect that to be long-term, they'll eventually find a guy who wants more and go for him.
No, this place isn't "single serving." However it is focused on attaining sex. There's a relationship forum because, surprise, many of us end up in relationships... but that doesn't mean most of this community is in any way an expert on relationships.

Then there's all the differing viewpoints on what things mean... like MLTR. That's why the first part of my reply is basically trying to get you to clarify what you're actually going for.

One guy here might think of MLTR as having a dozen fuckbuddies that stick around for more than a month each. Another guy, who might actually be more polyamorous, might think MLTR is having three women living with him for years.

Meanwhile, there are forums specifically dealing with polyamory... these tend to lean towards the relationship side of things more so than the getting laid part.

Here you'll see advice mostly geared towards fucking lots of women. Nothing wrong with that, but if you want anything that can be considered a long-term relationship with two or more women I'd suggest other sites.

TL;DR: Come here to find out how to get multiple chicks, go there to find out how to make it all work together as an actual relationship.