Bi-curious having trouble

Ive been wanting to have sex with a man since I was a teenager. I'm 24 now. I've gotten as far as giving a guy a blowjob and I loved it but that was a couple years ago now. I go on Grindr a lot but every time I try to make arrangements with a guy I like I get really nervous and back out before asking him to come over. Any advice on how to get over this or to make it easier for me.