Sti/std/sex/love

I recently just found out that I could have an sti/std bu someone I have been talking to he told me that something is odd and he thinks he might have something and I am the only person he has slept with and he asked me when was the last time before him which I previously told him just after it happened it’s been two months and I don’t know if I do, but the thing is I really like him and I’m really embarrassed I know who gave it to me because he was the only one I was messing around with it was a mutual thing we both didn’t want relationships but let’s explain how I got into this situation I saw the guy put the condom on but near the end I noticed the condom was on the floor and immediately stoped and I didn’t think nothing of it until now but the guy I’m talking who told me he thinks he might I really like him and if it comes out that he does I’m gonna be to embarrassed to see or talk to him or even take it to another level he was really nice about things didn’t seem mad we had a conversation and I explained was saying it’s his first time too and he just needs to tell me and that he didn’t want me to get mad about I’m asking(which I didn’t because well it’s not his fault?right) I haven’t been in a relationship for five years because my fist and only relationship was hard and I’m not confident because of that but I really wanted things to go somewhere with this guy because he has such a beautiful mind/soul and personality but I don’t know what to do so if anyone can help it would be appreciated