was I too harsh to him? long read. photos attached!!

This guy completely manipulated me and told me all these things I wanted to hear and asked for sex,nudes,blowjobs. Anything he could get. Of course I said no to everything. But he was in a break with his girlfriend that wouldn't give him anything either. I felt so bad that he asked me for this stuff because the girlfriend ( back together now) doesn't know he was technically cheating. He said it don't count tho they weren't together for that short period of time. Long story short I found out he was asking another girl the same stuff and told me he loved my body etc at the time. So girlfriends and Him are back together and I saw on fb it said ' going to miss my sweetheart, love you so much' and I thought you asshole! You lieing asshole! So I wrote him this. Is it too harsh?