(Gay) My boyfriend confessed that he used to love his ex bf?

[Secret-Mystery]

So I've been dating my man for a month now , and last week he told me 'I love you' and feeling the same I said 'I love you too' . Then he told me he loves me more and I said no I do love you more , and he asked me how do I know that? I said because I'm 20 , never dated anyone , his my very frist boyfriend , the first person I kiss ,that I'm still virgin, the person I was waiting for... Then he told me that I am the first person he ever loved , and he never told anyone I love you among his 4 EXs, his first time was when he was 17, and that his longest relationship wasn't more than 2 weeks!

It was all fine until yesterday he told me that the day before "by luck" he found on of his EXs facebook accounts , he said he didn't want to talk about him because he wanted to froget him and when he found him he felt weird , and he told me he was his first time when he was 15 I asked if he loved him
he said yes I did .
Afterwards I tried to log in on his facebook account I found that he changed his password

Now I don't know what to think , like does he still have feelings for him? did he change his password because he spoke to him? why did he lie to me? Is he hiding other things?

I used to feel special when I believed I was the first to whom he said 'I love you' and mean it .. but not anymore. I also was ready to have s*x with him but now I don't know what if as he looked me in the eye and told me 'you are the first person I love , you are so far the longest relationship I've ever had' and lied to me what if is the same as when he looks me in the eye and says 'I love you'

I don't want to play my b*tch or smtg like that but I can't help

What should I do please people?