Upon reading your bio, these men get the impression that you are someone who is carrying a lot of trauma from past negative experiences with matches or love interests.
After all, you are yet to have the exclusivity talk.
There is a good chance that just like you, he is still using the dating app and entertaining new matches.
Yes, you have been seeing each other, but unless there is a proper discussion about exclusivity, there is no reason for you to tell him that you are going on dates with others.
A guy in his 30s is likely going to date a woman in her late 20s to early to mid 30s.
These are women who are usually within 1 to 3 years of his own age.
Ergo, if you are a woman in her 30s who is looking to date a man in his 30s, you have a very statistically high chance of accomplishing this.
Granted, it is understandable that you worry about whether he would have an issue with how hard of a time it might be for you to get pregnant as a woman in her 30s.