My bestfriend's ex wants to court me

Don't get me wrong, I love my bestfriend so much parang magkapatid na kami. And I admit, I had a crush on her ex nung hindi pa sila. When they got together, nag try naman ako mag move on and minsan iniisip ko nalang na "happy crush" lang naman. My friend and I are like sisters, madalas kami kumain sa labas, at mag sleep over. Nung sila na ako yung ginawa nilang third wheel. Actually, mas sweet pa sa akin bestfriend ko sa mga time na lumalabas kaming tatlo. They broke up already and recently, her ex is trying to make a move on me. I don't want to seem desperate and I also don't want to get on my friend's bad side.