Is it possible to have two relationships at the same time :( ?

I've had a boyfriend for a couple of months but my ex instantly showed up and I couldn’t resist him. There are different things I like about each of two so I dont want to break up with either of them. Do you think it is possible for me to have two relationships?

Is it possible to have two relationships at the same time :( ?
Is it possible to have two relationships at the same time :( ?
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