Why are those women items still laying around on his Apt, can he possibly be lying?

Hi, So The times that I have gone to my boyfriend (37/M) City apartment which are not many times, because he actually has 2 student apartments one here where I live, because he happens to go to the university here in my town,and he has another apartment in the city which is his official apartment (The one that I am talking about now), the point is, I have seen around 3 or 4 woman stuff laying around, on the bathroom, I saw a black eyeliner, closed kotex pads, thrown in a corner of the bathroom, there was also like two shopping bags from womens clothing stores thrown in the floor of his bedroom with a bunch of other bags and random stuff, they had stuff inside for sure!, but I don’t know what it was cause I did not check, he was to close by, I asked him and he told me that his ex Gf used to live there with him for some time and then they had broken up and she left to united states.

I suppose they broke up in 2013 or before but I really have no clue, we have been together almost 3 years, in the beginning of 2014 we started going out,,I have been seeing these items since the first time I went to his apartment.but at the end of 2014(July-august) and beginning of 2015(February) I saw the 2 bags from womans stores, he has such a mess in that apartment that honestly I dont even know if those bags where there before and perhaps I did not see them.

I don’t know if His excuse is believable or not, but sounds sketchy to me, why would he keep all those things laying around since forever in there (I do admit he is very messy but still), it does not make sense, he should have thrown them away LONG time ago, when she left or something. The times that I have gone, their always there, and some time ago I saw a shopping bag I had not seen there before! I wonder if these bags where left there when the ex left and he uses them to put clothes or stuff in them?