Money for a roof

I purchased a house from my cousin, papers were signed in August of 2008. When tha appraisal was done in March, The appraiser asked about the roof, stating that it looked worn. My cousin stated he was going to give me $1000.00 at closing, but the appraiser did not put that in his notes. Well after closing, my cousin would not give me the money. I called the appraiser and he does not remember my cousin saying that, because he appraises so many properties. But in July of 2008, my boyfriend and I asked my cousin again, if he was going to give us the money at closing, he stated yes. Now since we did not have this in writing, only a verbal agreement as well as text messages regarding the money for the roof(my cousin stating that he would help with the roof), Can I take this to small claims court, since I have a witness and the text messages? I live in Texas Thank You! Sue Ann Ellison