Please help! Is he playing me like the others?

Please help! Is he playing me like the others?

Pls I plead for anonymity. ‎Pls, post this one. Please!
In recent years, I have never had a perfect relationship. It’s either I love d guy too much or he loves me too much and I don’t reciprocate. So recently, I decided I’m fed up and want to settle with a guy who’s serious and I would be serious with too.
I met this handsome, tall, comfortable guy. We talked, I visited him at home and he was already touching me anyhow and trying to seduce me on d first day, but I didn’t give in the 1st & 2nd time I visited me but d 3rd time, I fell like an idiot and we had sex. My male friends who knows him told me that d guy is a womaniser and once he sleeps with women, he dumps them and never calls them. Sincerely, I’m falling stupidly in love with this guy and so far, he hasn’t acted like he wants to dump me, I recently found out that he has a girlfriend who isn’t based where we are. ‎When I asked him about her, he said they were not in a serious relationship, that I was safe with him. This lady’s name is saved as ‘My Heart’ on his phone. She’s always tagging him in all her pictures on Facebook and it’s so disgusting. But I pretend that I don’t know she’s the ‘my heart’ and I have decided to be playing dumb. Now, I’m tired of ‎just playing along, I’m falling in love with him.
Pls, I need ur advice on what to do. I might do something bad to myself if he eventually dumps me.
Thank u.