A lot of people at work say “I can sing” and I believe I can classify myself “above average” in that department. I did get better at it but it takes a while.
I didn’t do any music academy and in primary school I was considered the guy “that could draw” while others “did music”. I never got the fun stuff to sing and the over-zealous teacher gave me the simplest stuff on purpose.
I developed some affinity for singing when discovering more than than the religion-related songs we got in school. I remember not being any good but I could remember vocal melodies very well and I knew when I was on the note or not. I liked to sing but also learned guitar.
I always had endless respect for people playing and singing at once.
I learned guitar here but didn’t sing over it for years and years; all of that came later, when the guitar parts were auto pilot.
Now I’m the only one left of my whole year doing something with music.
Years of NOT singing over guitar but solidifying that, made a lot of it muscle memory and it gave me the processor speed to actually LISTEN to myself when singing.
A lot of you guys started singing over their playing a lot earlier than I did. Yet I don’t feel sorry for that. I only got better at singing…by singing yet I always had the feeling I “had it in me somehow” since my childhood. I don’t believe in “talent” ( Tip: My view on the concept “talent” ) except for some genes, most of it is hard work made fun, fueled by passion 
IF you like singing, well sing
Don’t be bitter, get better!
…by singing…listening, recording, an occassional coaching session and trying various stuff while exploring and changing your limits.