OH the feeling of falling in love

How do you finally get over your fear of telling someone you love them? Like tips on how to get the guts to do it and let go of your fears? My boyfriend and I just reached six months. I’ve never been in love before and he’s had very toxic relationships in the past so I just wanna be very careful approaching this. I know he has very strong feelings for me and I know he is the happiest he has ever been in a relationship. I just don’t wanna ruin it by saying it too soon.