I met this guy 3 years ago we both are 24 yrs old.. At first we were friends and then we both kind of had a crush on each other I felt like I was falling for him then all of a sudden he tells me that he's in love with another girl I was in shock because he was telling me stuff that made me get attaché to him and then this happens!
So I ignored my feelings and stayed friends with him although it was kind of hard but I did it cause I didn't want to lose him as a friend too.. After a while we got close again and then he started to hang out with a girl that I know without telling me and without knowing that I know I didn't want to tell him I got mad we had a fight I asked him not to talk to me anymore.. We stopped talking for couple of months, but he was textig me once in a while asking how I was doing telling me that he misses me I replylied, but never texted him asking about him because I was so mad.. Last month he texted me so I was like OK fine we can be friends again.. Then he tells me that I'm the one and he will always have feelings for me and doesn't want to lose me again and that he was wrong all that time of how he treated me and this time it will be different.. I said I need time and he agreed but we talk and hang out everyday as if we are boyfriend and girlfriend.
Deep down I really want him back and I really want this to work this time, but sometimes I hesitate because of what he did before and I'm afraid that it will happen again, although I see this time well so far he means what he's saying from the way he's treating me..
Do I have to ask him about the other girl? N Am I making a good decision by giving him another chance? Does he deserve one?

Yes yes yes yes