Guys, Why won't the guy im dating commit after 4 months?

We have spent new year, valentines, extended periods of time over Christmas, his birthday and been away together yet he won't make me his girlfriend. He says he doesn't want to rush it as people get hurt. He says he is not dating or sleeping with anyone else but i know he still has dating apps. He spends his weekends with me or his parents apart from the time spent doing sport which takes up several hours over the weekend. His parents know all about me but i've not met them yet. His house is full of things belonging or given by me so i don't think he is bringing other people there. Another issue is he never stays at mine which is slightly irritating but i can live with it (this also isn't possible at weekends due to sport) Any ideas? What do i do?
Guys, Why won't the guy im dating commit after 4 months?
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