Hey - that's great! Seems like you are grasping all of the concepts you have learned on this site if you are attracting women left and right.
I'll get to your questions now. Your grammar and punctuation is slightly off key, so I'll try my best to make out what you are trying to say. You say that you currently have a girlfriend, and have been dating her for 4 months, and things between you are great. (Good sex, fun, etc). Now, your question is that you are wondering if you should cut dating other chicks because you really like her? Um, okay. Not sure what you have been reading, but in my point of view, if you are going out with her, you should be committed to her and only date her. NOW, don't confuse this with not talking to other women, because that is not what I am trying to say. Continue to talk to and make friends with many other women, but don't have any sexual interaction with those other women - as I am pretty sure that will harm your girlfriend. Most guys are TOO committed, they loose touch and stop talking to other women and stay too attached to the girl they are with - all this site says to do is to make sure NOT to do that.
Now to get to your second question - it's opinion based so I will just state my views on the matter. I feel it's fine for guys to wear make up to a moderation. If it shows you are wearing make-up, than you are wearing too much. That's just what I feel. I, myself, do NOT wear any make-up for the reason that make up just covers up something, it does not cure it. I'll give you an example: Many guys wear make-up during their teen years to cover up pimples, etc. A guy like me would go to the root cause of the pimples and treat it with medication so it goes away, instead of covering it up.
If there is no solution to the problem, than make-up is fine - I know for a fact that I have seen many posts where in fact guys do post about wearing make-up; as long as it does not show, it's fine. You don't want the ladies complimenting you on how you do your make up, now do you?