i also have this ex bf before. when we broke up, he got himself a gf then after they broke up for months, he dmed me and asked me to go out with him again. he did that for months. i still have lingering feelings for him at that time but i was too unwilling. i kept thinking about it for weeks and i rejected him. idk how to feel but now i'm glad that i did that. he always does it though. a year after he did it again but nah, i rejected him. if he still wants me after going put with others, he should've done better when we're still together.