Confused

Alright so i'd just like to say up front that I am not one of those girls that a guy could drop hints on to show he likes her, I never pick up on it, i'm the type of girl you have to set a brick wall in front of before I realise whats going on.
Anyways, I have been writing an old friend of mine. We went on one date 2 years ago while my BD and I were on and off but I ended up staying with my BD. Then a little over 2 months ago BD and I seperated and me and this old friend came in contact again. Needless to say the last night we could text before he left for basic we got into an argument because he couldn't understand why I had stayed with my BD for so long.
2 weeks later while at basic he called me to apolagise (BEFORE CALLING HIS MOM) and to get my mailing address. Since then he has wrote me, the first letter a written apolagy and him talking about rebuilding our "friendship", I wrote back forgiving him and telling him that rebuilding our friendship would be time well spent.
The letter I received today said this, "You have no idea how happy I was to get a letter from you. I know that we all make mistakes, but I hate making mistakes with you. I know I have had a lot of screw ups in our "relationship", but I regret every single one. The mail here does run slow, so it will be a super slow building process but it'll be worth it."
I am starting to catch feelings but don't want to bust out with anything too intense. How would you interprate his feelings?

How old r yal? Sounds like yal both have feelings for each other...but have a long road ahead....I think yal had the argument cause he was mad u stayed with BD instead of being with him...but he don't understand that everyone wants the father to b n their babys life....I think as long as u take it slow yal will b ok but u have to make sure what UR feeling is real and not a rebound from BD

Quoting Amanda Hellums:" How old r yal? Sounds like yal both have feelings for each other...but have a long road ahead....I think ... [snip!] ... think as long as u take it slow yal will b ok but u have to make sure what UR feeling is real and not a rebound from BD"

I'm 19, and he is 20. I don't want to be too much more than friends right now because I wanna have my littler girl and focus on my kids before jumping into something.